mcquay microtech iii ed15112-8_feb2011

Engineering Data ED 15112-8

Group: Controls

Part Number: ED 15112

Date: February 2011

Supersedes: ED 15112-7

© 2011 McQuay International

MicroTech® III Rooftop and Self Contained Unit Controller Protocol Information

BACnet® Networks LONWORKS® Networks

Applied Rooftop Models: RPE, RDE, RPS, RDT, RFS, RDS and RAH

Self-Contained Models: SWT, SWP

Maverick™ II Commercial Rooftop Model: MPS

2 ED15112-8

Table of Contents

Table of Contents............................................................................. 2 Revision History .............................................................................................3 Software Revision...........................................................................................4 Reference Documents .....................................................................................4 Notice ..............................................................................................................4 Limited Warranty............................................................................................4 Introduction ...................................................................................... 5 Unit Controller Data Points ............................................................................5 Protocol Definitions........................................................................................5 Basic Protocol Information ............................................................. 6 Setting Unit Controller Communications Parameters ....................................6 BACnet Networks...........................................................................................6 MicroTech III Unit Controller Device Object................................................8 Network Considerations .................................................................................9 LONWORKS Networks ..................................................................................11 Typical Application: Minimum Integration .................................. 16 Set up the Unit for Network Control ............................................................16 Display Important Data Points .....................................................................16 Network Off ..................................................................................................16 Network Occupancy Scheduling ..................................................................16 Alarms...........................................................................................................17 Unit Controller Sequence of Operation........................................................18 Comprehensive Data Point Tables............................................... 19 BACnet Standard Objects.............................................................................19 LONWORKS Variables ..................................................................................24 Detailed Data Point Information ................................................... 28 AHU Loc/Net................................................................................................28 Application Mode .........................................................................................28 Airflow Switch (Fault)..................................................................................29 Airflow Switch (Warning)............................................................................29 Application Version......................................................................................30 Building Static Pressure................................................................................30 Building Static Pressure Setpoint .................................................................30 Conductivity..................................................................................................31 Control Temp Source....................................................................................31 Control Temperature.....................................................................................32 Cooling Capacity ..........................................................................................32 Cooling Status...............................................................................................32 Date ...............................................................................................................33 Dew Point Setpoint .......................................................................................33 Dew Point Temperature................................................................................34 Dirty Filter Switch ........................................................................................34 Discharge Air Temperature ..........................................................................34 Duct High Limit Switch................................................................................35 Duct Static Pressure ......................................................................................35 Duct Static Pressure Setpoint .......................................................................35 Economizer Capacity....................................................................................36 Economizer Enable .......................................................................................36 Economizer Status ........................................................................................37 Effective Discharge Air Temperature Setpoint ............................................38 Effective Setpoint Output .............................................................................38 Emergency Off Switch .................................................................................39 Emergency Override .....................................................................................39 Energy Recovery Discharge Air Temperature .............................................40 Energy Recovery Exhaust Air Temperature ................................................40 Energy Recovery Wheel Status ....................................................................41 Energy Recovery Wheel Speed ....................................................................41 Entering Fan Temperature / Leaving Coil Temp .........................................41 Entering Water Temperature ........................................................................42 Exhaust Fan Capacity ...................................................................................42 Exhaust Fan Capacity Input..........................................................................43 Freeze Switch (Fault)....................................................................................43 Freeze Switch (Problem) ..............................................................................43 Heat Fail Input ..............................................................................................44 Heating Capacity...........................................................................................44 Heating Status ...............................................................................................45 High Pressure Circuit 1 Switch ....................................................................45 High Pressure Circuit 2 Switch ....................................................................46 High Pressure Circuit 3 Switch ....................................................................46 High Pressure Circuit 4 Switch ....................................................................46

High Pressure Circuit 5 Switch ....................................................................47 High Pressure Circuit 6 Switch ....................................................................47 High Pressure Circuit 7 Switch ....................................................................48 High Pressure Circuit 8 Switch ....................................................................48 HVAC Unit Type Identifier..........................................................................48 Local OA Temperature .................................................................................49 Local Space Temperature .............................................................................49 Low Pressure Circuit 1 Switch .....................................................................50 Low Pressure Circuit 2 Switch .....................................................................50 Low Pressure Circuit 3 Switch .....................................................................50 Low Pressure Circuit 4 Switch .....................................................................51 Low Pressure Circuit 5 Switch .....................................................................51 Low Pressure Circuit 6 Switch .....................................................................52 Low Pressure Circuit 7 Switch .....................................................................52 Low Pressure Circuit 8 Switch .....................................................................52 Maximum Discharge Air Heating Setpoint.................................................. 53 McQuay AHU Unit Status............................................................................53 Minimum Discharge Air Cooling Setpoint .................................................. 54 Minimum Send Time....................................................................................55 Mixed Air Temperature ................................................................................55 Network Discharge Air Cooling Setpoint ....................................................56 Network Discharge Air Heating Setpoint ....................................................56 Object Request..............................................................................................56 Object Status .................................................................................................57 Occupancy .................................................................................................... 58 Occupancy Mode .......................................................................................... 59 Occupancy Scheduler Input.......................................................................... 60 Occupied Cooling Setpoint...........................................................................61 Occupied Heating Setpoint........................................................................... 62 Outdoor Air Damper Minimum Position Input............................................62 Outdoor Air Temperature ............................................................................. 63 Outdoor Air Temperature Input....................................................................63 Outdoor Airflow ...........................................................................................64 Outdoor Airflow Setpoint.............................................................................64 Primary Cool Enable.....................................................................................64 Primary Heat Enable.....................................................................................65 Receive Heartbeat ......................................................................................... 66 Reheat Capacity ............................................................................................67 Relative Humidity.........................................................................................67 Relative Humidity Input ...............................................................................68 Relative Humidity Setpoint ..........................................................................68 Remote Return/Exhaust Fan Capacity Control Flag ....................................68 Remote Supply Fan Capacity Control Flag..................................................69 Return Air Temperature................................................................................70 Return/Exhaust Fan Capacity ....................................................................... 70 Exhaust Fan Status........................................................................................71 Return Fan Capacity Input............................................................................ 71 Send Heartbeat..............................................................................................72 Space CO2 ..................................................................................................... 72 Space IAQ Input ........................................................................................... 73 Space Temperature .......................................................................................73 Space Temperature Input..............................................................................73 Sump Pump Water Level Switch .................................................................74 Supply Fan Capacity.....................................................................................74 Supply Fan Capacity Input ........................................................................... 75 Temperature Setpoint Input .......................................................................... 75 Time ..............................................................................................................75 Unit State ...................................................................................................... 76 Unit Support.................................................................................................. 77 Unoccupied Cooling Setpoint....................................................................... 77 Unoccupied Heating Setpoint....................................................................... 78 VAV Box Output ..........................................................................................78 Water Flow Switch .......................................................................................79 Water Regulating Valve ............................................................................... 79 Waterflow Switch Input................................................................................80 Alarms .............................................................................................81 Fault Alarms (Highest Priority)....................................................................81 Problem Alarms (Medium Priority) .............................................................82 Warning Alarms (Lowest Priority)...............................................................83 Alarm Monitoring.........................................................................................83

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Alarm Notification ....................................................................................... 84 Alarm Clearing ............................................................................................. 85 Objects .......................................................................................................... 85 Clear Alarms................................................................................................. 85 Notification Class - Faults............................................................................ 86 Notification Class - Problem........................................................................ 87 Notification Class - Warnings...................................................................... 88 Warning Alarm............................................................................................. 90 Problem Alarm ............................................................................................. 91 Fault Alarm................................................................................................... 92 Airflow Fault ................................................................................................ 93 Airflow Switch Warning .............................................................................. 93 Conductivity Warning .................................................................................. 94 Control Temp Fault ...................................................................................... 94 Dirty Filter Warning..................................................................................... 94 Discharge Sensor Fault................................................................................. 95 Duct High Limit Fault .................................................................................. 95 Emergency Off Fault .................................................................................... 95 Entering Fan Temp / Leaving Coil Temp Problem ..................................... 96 Entering Water Temp Problem .................................................................... 96 Freeze Fault .................................................................................................. 97 Freeze Problem............................................................................................. 97 Heat Fail Problem......................................................................................... 97 High Discharge Temp Fault ......................................................................... 98 High Pressure Circuit 1 Problem ................................................................. 98 High Pressure Circuit 2 Problem ................................................................. 98 High Pressure Circuit 3 Problem ................................................................. 99 High Pressure Circuit 4 Problem ................................................................. 99 High Pressure Circuit 5 Problem ............................................................... 100 High Pressure Circuit 6 Problem ............................................................... 100 High Pressure Circuit 7 Problem ............................................................... 100 High Pressure Circuit 8 Problem ............................................................... 101 High Return Temp Fault ............................................................................ 101

Low Discharge Temp Fault........................................................................ 102 Low Pressure Circuit 1 Problem ................................................................ 102 Low Pressure Circuit 2 Problem ................................................................ 102 Low Pressure Circuit 3 Problem ................................................................ 103 Low Pressure Circuit 4 Problem ................................................................ 103 Low Pressure Circuit 5 Problem ................................................................ 104 Low Pressure Circuit 6 Problem ................................................................ 104 Low Pressure Circuit 7 Problem ................................................................ 104 Low Pressure Circuit 8 Problem ................................................................ 105 Mixed Air Temp Problem .......................................................................... 105 Outdoor Temp Problem.............................................................................. 106 Return Temp Problem................................................................................ 106 Space Temp Problem ................................................................................. 106 Sump Water Level Problem....................................................................... 107 Waterflow Switch Problem........................................................................ 107 Water Regulating Valve Problem .............................................................. 108 BACnet Device Management.......................................................109 DeviceCommunicationControl - Disable................................................... 109 DeviceCommunicationControl - Enable.................................................... 109 ReinitializeDevice (Reset) ......................................................................... 109 Appendix A: Protocol Implementation Conformance Statement (PICS) ..................................................110 BACnet Protocol Implementation Conformance Statement ..................... 110 Product Description.................................................................................... 110 BACnet Standardized Device Profile ........................................................ 110 Standard Object Types Supported.............................................................. 112 Data Link Layer Options............................................................................ 115 Segmentation Capability ............................................................................ 115 Device Address Binding ............................................................................ 115 Networking Options ................................................................................... 115 Character Sets Supported ........................................................................... 115 Index ..............................................................................................116

Revision History ED15112 September 2008 Preliminary release.

ED15112-1 October 29, 2008 Added 2 notification class objects to BACnet. There are now a total of 3 objects (faults, problems & warnings).

ED15112-2 January 22, 2009 The only change was to the Networking Options section of the Protocol Information Conformance Statement (PICS). The BBMD does support registration by foreign devices. This was previously marked no. Changed the enumeration for the Water Regulating Valve object from 0=Open and 1=Closed to 0=normal and 1=alarm.

ED15112-3 March 11, 2009 The only change was to the Standard Object Types Supported section of the Protocol Information Conformance Statement (PICS).

Present Value, Priority Array were removed from the optional list for Binary Outputs. These properties are required.

Removed Alarm Value from the optional list for Binary Outputs. This is not a propertie of this object. Also removed Priority Array from Binary Inputs. This is not a property of this object.

Modified the optional properties for Multi-state Input.

Modified the optional properties for Multi-state Output

ED 15112-4 November, 2009 Added Maverick II (MPS) model. Modified keypad navigation per new global standard. Updated points affected by removal of BACnet heartbeat function (changed points from commandable to writable and removed reference to writing at priority 8). Added the following points: Heat Fail 199, Heat Fail Problem BV, ERDAT (AV), EREhht (AV), ERWhlOnOff (MV), ERWheelSpd (AV), Min OA Flw Spt (AV)

ED 15112-5 December, 2009 Changed ER Discharge Air Temp & ER Exhaust Air Temp BACnet object types from AV to AI.Updated firmware version from 2506017300 to 2506017301 in Software Revision and PICs sections.

ED 15112-6 February, 2010 Changed ER Wheel Speed BACnet object types from AV15 to AI15. Removed reference to energy recovery from Return Fan Capacity Input & Exhause Fan Capacity Input (Detailed Data Information section). Changed Application Mode enumerations in detailed data section. Updated PICS to include software v2506017302.

ED 15112-7 June, 2010 Changed nvoUnitStatus_inAlarm_ to nvo WarnAlarm, nvoProbAlarm, and nvoFaultAlarm in detailed data section. Updated software revision to v2506017304. Removed references to S7 switch on fig. 4.

ED 15112-8 February 2011 Added Control Temp Source (MSV 39) to BACnet. This is available in application 2506017306. Added DAC checkbox to Relative Humidity Input on the BACnet Standard Objects Table. Added Low/High Pressure Circuit Switch 7 and 8, added Low/High Pressure Circuit 7 and 8 Problem, changed Sump Pump Switch to Sump Pump Water Level Switch, changed Sump Pump Fail Problem to Sump Water Level Problem.

4 ED15112-8

Software Revision Keypad Menu Path Version Information\App Version=

The software part number is encoded in the controller’s memory and is available for display on the keypad/display. The part number is available via BACnet® system integration tools. The software part number codification is as follows:

250 6017 3 07 Implied digits on all MicroTech III Air Handling software Base part number (6017 indicates standard software) Version Revision

This edition documents Network Protocols for version 2506017307 of the standard MicroTech® III Unit Controller application and all subsequent versions until otherwise indicated. However, if your software is of a later version, some of the information in this document may not completely describe your application.

You can determine the revision of the application software from the keypad/display. The path for this information from the main menu is Version Information\App Version=.

Reference Documents Company Number Title Source

McQuay International OM 920 MicroTech III Unit Controls for Applied Rooftop and Self-Contained Systems Operation Manual

www.mcquay.com

American Society of Heating, Refrigerating and Air-Conditioning Engineers

ANSI/ ASHRAE 135-2004

BACnet® A Data Communication Protocol for Building Automation and Control Networks

www.ashrae.org

LonMark Interoperability Association

078-0120-01G LonMark® Layers 1-6 Interoperability Guidelines, Version 3.4

www.lonmark.org


078-0120-01G LonMark Application Layer Interoperability Guidelines, Version 3.4

www.lonmark.org


8500_10 LonMark Functional Profile: Space Comfort Controller, Version 1.0

www.lonmark.org


8600_10 LonMark Functional Profile: Discharge Air Controller, Version

www.lonmark.org

McQuay International ED 15113 MicroTech III Rooftop and Self-Contained Systems BACnet Protocol Implementation and Conformance Statement (PICS)

www.mcquay.com

Echelon Corporation 078-0156-01G LONWORKS FTT-10A Free Topology Transceiver Users Guide

www.echelon.com

Notice © 2011 McQuay International, Minneapolis MN. All rights reserved throughout the world

McQuay International reserves the right to change any information contained herein without prior notice. The user is responsible for determining whether this product is appropriate for his or her application.

The following are trademarks or registered trademarks of their respective companies: BACnet from American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. Echelon, LONWORKS, LONMARK, and LonTalk from Echelon Corporation, Windows from Microsoft Corporation, and McQuay, Maverick II and MicroTech III from McQuay International.

Limited Warranty Consult your local McQuay Representative for warranty details. Refer to Form 933-430285Y. To find your local McQuay Representative, go to www.mcquay.com.

http://www.mcquay.com/�

ED15112-8 5

Introduction

This document contains the necessary information you need to incorporate a MicroTech III Unit Controller (i.e. Applied Roofto, Self-Contained, or Maverick II™ Unit) from McQuay International into a building automation system (BAS). It lists all BACnet® properties, LONWORKS variables, and corresponding MicroTech III Unit Controller data points. It also contains the BACnet Protocol Implementation Conformance Statement (PICS). BACnet and LONWORKS terms are not defined. Refer to the respective specifications for definitions and details.

Unit Controller Data Points The MicroTech III Unit Controller contains data points or unit variables that are accessible from three user interfaces: the unit keypad, a BACnet network (BACnet/IP or MS/TP), or a LONWORKS network. Not all points are accessible from each interface. This manual lists all important data points and the corresponding path for each applicable interface. Refer to OM 920 (available on www.mcquay.com) for keypad details. This document contains the network details necessary to incorporate the MicroTech III Unit Controller into the network.

Protocol Definitions The MicroTech III Unit Controller can be configured in either an interoperable BACnet or LONWORKS network. The controller must have the corresponding communication module installed for network integration (see Reference Document section for corresponding part numbers). There are three communication modules: BACnet/IP, BACnet MS/TP (Master/Slave Token Passing), and LONWORKS. There are two LONWORKS modules: one in accordance with the LonMark Space Comfort Controller (General) functional profile and one in accordance with the Discharge Air Controller functional profile.

BACnet Protocol BACnet is a standard communication protocol for Building Automation and Control Networks developed by the American National Standards Institute (ANSI) and American Society of Heating, Refrigeration and Air-conditioning Engineers (ASHRAE) specified in ANSI/ASHRAE standard 135-2004. It addresses all aspects of the various systems that are applied to building control systems. BACnet provides the communication infrastructure needed to integrate products manufactured by different vendors and to integrate building services that are now independent.

LONWORKS Networks A control network specification for information exchange built upon the use of LonTalk for transmitting data developed by the Echelon Corporation.

LonTalk Protocol A protocol developed and owned by the Echelon Corporation. It describes how information should be transmitted between devices on a control network.

LonMark Certification LonMark certification is an official acknowledgement by the LonMark Interoperability Association that a product communicates using the LonTalk protocol and transmits and receives data per a standard LonMark functional profile. The LONWORKS communication modules are LonMark 3.4 certified in accordance with the Space Comfort Controller (SCC) and Discharge Air Controller (DAC) functional profiles.

6 ED15112-8

Basic Protocol Information

Setting Unit Controller Communications Parameters There are 12 communication parameters involved in setting up the unit controller for proper communication with the four communication module options (BACnet IP, BACnet MS/TP, LONWORKS SCC or LONWORKS DAC). These parameters are set differently depending on which communication module is ordered and shipped with the unit. The table below lists the three possible sets of default parameter settings. Not all the parameters apply to all the module options. The bold parameters can be changed using the keypad display located on the unit controller.

Communication Setup Parameter Settings Parameter Name BACnet IP BACnet MS/TP LON (DAC or SCC)

DHCP On N/A N/A

IP Address DHCP Enabled N/A N/A

IP Subnet Mask DHCP Enabled N/A N/A

Given IP Address1 127.0.0.1 N/A N/A

Given IP Subnet Mask1 255.255.255.0 N/A N/A

Given Gateway Address1 127.0.0.1 N/A N/A

UDP Port Number 47808 N/A N/A

MSTP MAC Address2 N/A 18 N/A

MSTP Baud Rate N/A 38400 N/A

Device Instance Number variable variable N/A

Max APDU Length 1476 480 N/A

Device Object Name POL908_FF2BEE3 POL904_AD45EC284 N/A

Receive Heartbeat 0Sec 0Sec 0Sec

Max Master N/A 127 N/A

Max Info Frames N/A 1 N/A

Term Resistor N/A No5 N/A

Notes: 1. These addresses are used if DHCP is set to Off. For changes to these parameters to take effect, use the keypad display and set Apply IP Chg on the IP

Setup menu to Yes and cycle power. 2. The MSTP MAC Address is set via the keypad/display. You must cycle power after changing it for the changes to take effect. 3. The last 6 digits are the last 6 digits of the MAC address. The MAC address is printed a sticker affixed to the BACnet communication module. 4. The last 8 digits are computed from the production number and date code. 5. Term Resistor is only changeable via the keypad/display. This item must be set to Yes for the first and last unit on the MS/TP network. On all other

units, this variable should be set to No (default).

BACnet Networks Compatibility The MicroTech III Unit Controller Unit Controller is tested according to the BACnet Testing Laboratory (BTL) Test Plan. It is designed to meet the requirements of the BACnet Standard (ANSI/ASHRAE 135-2004) as stated in the Protocol Implementation and Conformance Statement (PICS). However, it is not BTL listed. The PICS is located at the end of this manual or the separate PICS document, ED 15113 (available on www.mcquay.com.)

BACnet Objects MicroTech III Unit Controllers incorporate standard BACnet object types (i.e., object types defined in the BACnet Standard) that conform to the BACnet Standard. Each object has properties that control unit variables or data points. Some object types occur more than once in the MicroTech III Unit Controller; each occurrence or instance has different properties and controls different unit variables or data points. Each instance is designated with a unique instance index. Some properties can be adjusted (read/write properties, e.g., setpoints) from the network and others can only be interrogated (read-only properties, e.g., status information).

Each data point accessible from a BACnet network is described with a table that gives the Object Identifier, Property Identifier, Full BACnet Reference or path, and the Name enumeration of the property.

http://www.mcquay.com/�

ED15112-8 7

Example of BACnet Data Point Keypad Menu Path Standard Menus\Flow Summary\Ret/Exh Fan=

Object Identifier Property

Object Type Type ID Instance Name ID

Binary Output 4 1 Present_Value 85 Full Reference

<Device Name>.ExhFanState.Present_Value Enumeration

0 = Off 1 = On

Object Identifier Object Identifiers are each designated with an Object type as defined in the BACnet specification. The first column of the data point definition gives the object type. This object happens to be Return/Exhaust Fan Status (See page 71.)

The object identifier is a property of the object that you can read from the object. The name of the property is “Object_Identifier” and the property identifier is 75.

Each object in the unit controller has a unique identifier. BACnet object identifiers are two-part numbers of BACnet Object Identifier data type. The first part identifies the object type (the first 10 bits of the 32-bit BACnet Object Identifier [See ANSI/ASHRAE 135-2004 BACnet A Data Communication Protocol for Building Automation and Control Networks]). The first column of the data point definition gives the object type. The second part identifies the instances of that particular object type (the last 22 bits of the 32-bit BACnet Object Identifier).

The object identifier is shown in the data points listing as two numbers. The first number is shown in the Type ID column and designates the Object type enumeration. The second number is shown in the Instance column and designates the instance of that particular object type.

The object identifier is a property of the object that you can read from the object code. The name of the property is “Object_Identifier” and the property identifier is 75. The ASHRAE BACnet specification reserves the first 128 numbers for ASHRAE defined objects. Manufacturers may define additional object types and assign a number above 127 as long as they conform to the requirements of the ASHRAE BACnet specification.

Each object also has a name. Object names are character strings. The object name is a property of the object that you can read from the object. The name of the property is “Object_Name” and the property identifier is 77.

Objects are sometimes referred to as an object type and instance number as they are in the BACnet specification. The example object above would be: Binary Output, Instance 1.

Property Identifier Each object has a number of properties or attributes. Each property has a unique identifier of BACnet Property Identifier data type. Property identifiers are an enumerated set; a number identifies each member. The Property Identifier enumeration number is shown in the Property ID column. In the example above the property identifier is 85.

Property Name Each property also has a unique name. Property names are character strings and shown in the Property Name column. In the example above the property name is Present Value.

Full Reference The full reference is the path of the property within the network where the MicroTech III Unit Controller resides. It is a character string equivalent to the object identifier and the property identifier. In the example above the full reference is <Device Name>.ExhFanState.Present_Value.

Enumerated Values Some properties are standard data types and some are enumerated sets. If the property value is an enumerated set, all enumerated values and corresponding meaning are given in the Enumeration column of the data point listing.

8 ED15112-8

MicroTech III Unit Controller Device Object Each BACnet compatible device must have one and only one BACnet Device Object.

Device Object Identifier The MicroTech III Unit Controller Device Object Identifier uniquely specifies the unit within the network. The device object type for all devices is fixed by ASHRAE at 8. Therefore the device object instance number must be unique. The initial Device Object identifier is set at manufacturing. The device object identifier can be read from the unit controller. The name of the property is “Object_Identifier” and the property identifier is 75.

The initial device object instance number is 1579312. This number must be unique on the entire BACnet network. The object instance number can be changed via the keypad display. You must cycle power for the change to take effect.

! CAUTION

If another device in the network already has this object identifier (instance number), you must change the instance number of one device object, so that all devices in the network have a unique device identifier.

Device Object Name The Device Object Name uniquely specifies a device in the network. It must be unique in the network. The device name for the MicroTech III Unit Controller device is to be determined. The device name is the “prefix” of all object names in the MicroTech III Unit Controller. All objects include the device name and a period “.” preceding the object name.

The Device Object name is also available to the network in the device. The property name is “Object_Name” and property identifier is 77. For a BACnet IP card, the default Object Name is POL908_###### where ###### is the last 6 digits of the MAC address. For a BACnet MS/TP card, the default Object Name is POL904_######## where ######## is computed from the production number and date code.

Device Object Properties The device object contains many other informative properties as shown in Table 1.

Table 1. MicroTech III Air Handling Unit Controller Device Object Properties

Property Identifier Default Value Data Type

Object Identifier 75 Device, variable BACnetObjectIdentifier

Object Name 77 POL908_FF2BEE1

Character String

Object Type 79 8 BACnetObjectType

System Status 112 BACnetDeviceStatus

Vendor Name 121 McQuay Character String

Vendor Identifier 120 3 Unsigned 16

Model Name 70 AHU Character String

Firmware Version 44 variable Character String

Application Software Revision 12 variable Character String

Location 58 Character String

Description 28 MTech III AHU Character String

Protocol Version 98 1 Unsigned

Protocol Revision 139 4 Unsigned

Protocol Services Supported 97 BACnetServicesSupported

Protocol Object Types Supported2 96 AI, AO, AV, BI, BO, BV, Cal, Device, MSI, MSO, NC, Sch, MSV

BACnetObjectTypesSupported

Object List 76 Sequence of BACnetObjectIdentifer

Max APDU Length Accepted 62 1476 (IP) / 480 (MS/TP) Unsigned 16

ED15112-8 9

Property Identifier Default Value Data Type

Segmentation Supported 107 None BACnetSegmentation

Max Segments Accepted 167 16 Unsigned

Local Time3 57 variable Time

Local Date3 56 variable Date

UTC Offset 119 -120 (Range: –780 .. 780) Integer

Daylight Savings Status 24 variable Boolean

APDU Segment Timeout 10 2000 Unsigned

APDU Timeout 11 3000 Unsigned

Number of APDU Retries 73 3 Unsigned

Device Address Binding 30 Sequence of BACnetAddressBinding

Database Revision 115 1 Unsigned

Active COV Subscriptions 152 List of BACnetCOVSubsriptions

1. For BACnet IP, the last 6 digits are the last 6 digits of the MAC address. The MAC address is printed a sticker affixed to the BACnet communication module. For BACnet MS/TP, the last 8 digit are computed from the production number printed on the bar code label affixed to the side of the module.

2. While the MicroTech III Unit Controller supports the entire set of object types, not all object types are used. See the Object List for details.

3. The BACnet communication module and the MicroTech III Unit Controller both have their own time clocks. The date and time read via BACnet could differ from the date and time in the unit controller the date or time is changed via the keypad display. The two time clocks resynchronize approximately every 60-68 minutes and after every power cycle of the unit controller or BACnet communication module.

Network Considerations Access to Properties Object properties are accessible from the network by specifying the device object identifier, object identifier, and the property identifier. To access a property, you must specify the object identifier including the device object identifier or the object name including the device object name and the property identifier.

BACnet/IP Addressing The BACnet/Internet Protocol (BACnet/IP) address of the MicroTech III Unit Controller in a BACnet/IP network consists of the four-octet Internet Protocol address followed by the two-octet UDP (User Datagram Protocol) port number. The BACnet/IP address is a six-octet value analogous to a MAC address. The IP address portion of the BACnet/IP address must be unique in the BACnet/IP network segment. The default UDP port number in the MicroTech III Unit Controller is 47808 (BAC0 in hexadecimal).

The device object of the MicroTech III Unit Controller contains a Given Internet Protocol Subnet Mask (Default is 255.255.255.0) and a default Given IP address of 127.0.0.1. The controller does support DHCP (Dynamic Host Configuration Protocol) IP addressing which is enabled by default.

The keypad/display can be used to configure the BACnet/IP addressing. The keypad will display the current IP address only when the network is connected.

The MicroTech III Unit Controller can be incorporated into a BACnet/IP network dedicated to BACnet devices only or an Ethernet network shared with BACnet devices and other devices.

Shared Ethernet Networks Integrating the MicroTech III Unit Controller into a shared Ethernet LAN requires close cooperation with the network administrator of the shared Ethernet network. First, verify whether DHCP should or should not be enabled. If not, obtain the IP Subnet Mask of the shared network from the network administrator. Then, obtain static IP Addresses for all MicroTech III Unit Controllers you are integrating into the shared network. Finally obtain the address of an IP Router to use for sending IP messages to and from the BACnet IP subnets. Once you have these, refer to Setting Unit Controller Communication Parameters in the Basic Protocol Information section found previously in this document.

10 ED15112-8

Configuring the Unit Controller The MicroTech III Unit Controller with attached BACnet communication module is ready to operate with the default values of the various parameters. Default values may be changed with the unit’s keypad or via the network. See the MicroTech III Unit Controller Operation Manual (OM 920).

BACnet MS/TP Network Addressing The BACnet MS/TP device address (Media Access Control [MAC] address) of the MicroTech III Air Handling Unit Controller in a BACnet Master Slave/Token Passing (MS/TP) Local Area Network (LAN) is set using the keypad/display. Navigate to the Advanced Menus\MSTP Setup menu to change this value. You must cycle power (turn the unit controller off and then on again) in order for the new address to take effect.

ED15112-8 11

LONWORKS Networks LONWORKS technology, developed by Echelon Corporation, is the basis for LonMark interoperable systems. This technology is independent of the communications media. The LonMark Interoperable Association has developed standards for interoperable LONWORKS technology systems. In particular they have published standards for HVAC equipment including the Discharge Air Controller functional profile and the Space Comfort Controller functional profile. These profiles specify a number of mandatory and optional standard network variables and standard configuration parameters. This manual defines these variables and parameters available in the MicroTech III Unit Controller.

Compatibility The MicroTech III Unit Controller with LONWORKS communication module operates in accordance with the Discharge Air Controller (DAC) functional profile or the Space Comfort Controller (SCC) functional profile of the LonMark Interoperability standard.

LONWORKS Variables MicroTech III Unit Controllers incorporate LONWORKS network variables to access unit data points. The unit controller uses LONWORKS Standard Network Variable Types (SNVT) from each profile. Some data points can be adjusted (input network variables, nvi) (read/write attributes, e.g., setpoints) from the network and others can only be interrogated (output network variables, nvo) (read only attributes, e.g., status information). Configuration variables (nci) are included with the read/write attributes.

Each data point accessible from a LONWORKS network is described with a table that gives the LONWORKS Name, Profile, SNVT Type, and SNVT Index. If the variable is a configuration variable the table also includes the SCPT Reference and the SCPT Index. Example of LONWORKS Data Point LonWorks

LonWorks Name Profile SNVT Type SNVT Index

nvoBldgStatPress DAC, SCC SNVT_press_p 113

LONWORKS Name Each network variable has a name that you use to access the data point. This is the name of the variable from the profile. In the example above the name network variable is nvoBldgStatPress. Profile The profile column designates the MicroTech III LONWORKS Communication Module that incorporates this network variable. The variable itself may not be a standard component of that particular profile, but the communications module does implement and it is available to the network. SNVT Type This column gives the name of the standard network variable type from the master list. SNVT Index This column gives the number of the standard network variable type from the master list. SCPT Reference This column gives the name of the Standard Configuration Parameter Type (SCPT) from the master list. SCPT Index This column gives the number of the Standard Configuration Parameter Type (SCPT) from the master list.

Network Considerations Network Topology Each LONWORKS Communication Module is equipped with an FTT-10A transceiver for network communications. This transceiver allows for (1) free topology network wiring schemes using twisted pair (unshielded) cable and (2) polarity insensitive connections at each node. These features greatly simplify installation and reduce network commissioning problems. Additional nodes may be added with little regard to existing cable routing.

12 ED15112-8

Free Topology Networks

A LONWORKS “free topology network“ means that devices (nodes) can be connected to the network in a variety of geometric configurations. For example, devices can be daisy-chained from one device to the next, connected with stub cables branching off from a main cable, connected using a tree or star topology, or any of these configurations can be mixed on the same network as shown in Figure 1. Free topology segments require termination for proper transmission performance. Only one termination is required. It may be placed anywhere along the segment. Refer to Echelon LONWORKS FTT-10A Transceiver User’s Guide for further details (see Reference Documents section).

Free topology networks may take on the following topologies:

Bus Ring Star Mixed - Any combination of Bus, Ring, and Star

Note: Limitations to wire lengths apply and must be observed.

Figure 1. Singly Terminated Free Topology

Termination

Star Topology

Termination

Ring Topology

Termination

Singly Terminated Bus TopologyStub

}

Termination

Mixed Topology

A network segment is any part of the free topology network in which each conductor is electrically continuous. Each of the four diagrams is a illustration of a network segment. Some applications may require two or more segments; see “Free Topology Restrictions.” If necessary, segments can be joined with FTT-10A-to-FTT-10A physical layer repeaters. See Figure 2. Refer to Echelon LONWORKS FTT-10A Transceiver User’s Guide for further details.

Figure 2. Combining Network Segments with a Repeater

Termination Termination

FT

T-1

0A

FT

T-1

0A

ED15112-8 13

Free Topology Restrictions Although free topology wiring is very flexible, there are restrictions. A summary follows, refer to the Echelon FTT-10A User’s Guide for details.

1. The maximum number of nodes per segment is 64.

2. The maximum total bus length depends on the wire size: Wire Size Maximum Node-to-Node Length Maximum Cable Length

24 AWG 820 ft (250 m) 1476 ft (450 m)

22 AWG 1312 ft (400 m) 1640 ft (500 m)

16 AWG 1640 ft (500 m) 1640 ft (500 m)

The longest cable path between any possible pair of nodes on a segment must not exceed the maximum node-to-node distance. If two or more paths exist between a pair of nodes (e.g., a loop topology), the longest path should be considered. Note that in a bus topology, the longest node-to-node distance is equal to the total cable length. a. The total length of all cable in a segment must not exceed the maximum total cable length.

3. One termination is required in each segment. It may be located anywhere along the segment.

Doubly Terminated Networks You can extend the maximum total cable length without using a repeater by using doubly-terminated network topology. See Figure 3. The trade-offs are (1) this network topology must be rigorously followed during the installation and subsequent retrofits and (2) two terminations must be installed at the ends of the bus for proper transmission performance. Refer to Echelon LONWORKS FTT-10A Transceiver User’s Guide.

Note: Limitations to wire lengths apply and must be observed.

Figure 3. Doubly Terminated Network Topology

Termination Termination

Doubly Terminated Topology Restrictions The restrictions on doubly-terminated bus topology are as follows:

1. The maximum number of nodes per segment is 64.

2. The maximum total bus length depends on the wire size: Wire Size Maximum Cable Length

24 AWG 2952 ft (900 m)

22 AWG 4590 ft (1400 m)

16 AWG 8855 ft (2700 m)

3. The maximum stub length is 9.8 ft (3 m). The length of the MicroTech III Air Handling LONWORKS cable harness stub is 7.2 ft (2.19 m).

A stub is a piece of cable that is wired between the node and the bus. See Figure 1. Note that if the bus is wired directly to the node, there is no stub, and thus the stub length is zero. If you are wiring to a field terminal strip on a unit, be sure to account for any factory wiring between the terminal strip and the controller. This wiring is considered part of the stub.

4. Two terminations are required in each segment. One must be located at each end of the bus.

Network Cable Termination LONWORKS network segments require termination for proper data transmission performance. The type and number of terminations depend on network topology. Refer to Echelon LONWORKS FTT-10A Transceiver User’s Guide.

LonWorks Network Addressing Every Neuron Chip has a unique 48-bit Neuron ID or physical address. This address is generally used only at initial installation or for diagnostic purposes. For normal network operation, a device address is used.

14 ED15112-8

Device addresses are defined at the time of network configuration. All device addresses have three parts. The first part is the Domain ID, designating the domain. Devices must be in the same domain in order to communicate with each other. The second part is the Subnet ID that specifies a collection of up to 127 devices that are on a single channel or a set of channels connected by repeaters. There may be up to 255 subnets in a domain. The third part is the Node ID that identifies an individual device within the subnet. A group is a logical collection of devices within a domain. Groups are assembled with regard for their physical location in the domain. There may be up to 256 groups in domain. A group address is the address that identifies all devices of the group. There may be any number of devices in a group when unacknowledged messaging is used. Groups are limited to 64 devices if acknowledged messaging is used. A broadcast address identifies all devices within a subnet or domain. LONWORKS network variables for both the Discharge Air Controller and the Space Comfort Controller are defined below. Variables are used in both the Space Comfort Controller and Discharge Air Controller profiles unless marked otherwise. Commissioning the Network Pressing the service pin, switch on the LONWORKS Communication Module, generates a service pin message, which contains the Neuron ID and the program code identification of the node. A service pin message is a network message that is generated by a node and broadcast on the network. It can be used to commission the LONWORKS network. A network configuration tool maps device Neuron IDs to the domain/subnet/node logical addressing scheme when it creates the network image, the logical network addresses and connection information for all devices (nodes) on the network.

External Interface File (XIF) LonMark guidelines specify exact documentation rules so that proprietary configuration tools are not required to commission and configure LONWORKS devices. The MicroTech III LONWORKS Communication Module is self-documenting so that any network management tool can obtain all the information needed over the network to connect it into the system and to configure and manage it. An External Interface File (a specially formatted PC text file with an extension .XIF) is also available so that any network tool can design and configure it prior to installation. XIF files are available on www.mcquay.com.

Configuring the Unit Controller 1. The MicroTech III Unit Controller is designed, programmed, and configured to be a rooftop or self-contained unit

controller in accordance with either the LONMARK Discharge Air Controller (DAC) or LonMark Space Comfort Controller (SCC) functional profile. The unit is ready to operate with the default values of the various parameters set at the factory. Default values may be changed with the unit’s keypad or via the network. See the MicroTech III Unit Controller Operation Manual (OM 920).

Data Integrity The integrity of some data depends on a valid network connection to maintain current values. The following data points require a valid network connection if bound. If data points listed in Table 2 do not change after a given time, the controller reverts to local control. In the case of the LonWorks module, the variables will revert to their default values.

ED15112-8 15

Table 2. Receive Heartbeat Variables Data Point LonWorks Variable

Occupancy Scheduler Input nviOccSchedule

Application Mode nviApplicCmd

Supply Fan Capacity Input nviSupFanCap

Outdoor Air Temperature nviOutdoorTemp

Space Temperature nviSpaceTemp

Primary Cool Enable nviPriCoolEnable

Primary Heat Enable nviPriHeatEnable

Economizer Enable nviEconEnable

Exhaust Fan Capacity Input nviExhFanCap

Return Fan Capacity Input nviRetFanCap

Water Flow Switch Input nviCWFlow

Space Indoor Air Quality (IAQ) Input nviSpaceIAQ

Relative Humidity Input nviSpaceRH

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Typical Application: Minimum Integration

When you have integrated the unit into your network, you can monitor and control unit operation from your workstation. At a minimum, you can:

Display and monitor a minimum of important data points on your workstation display

Turn the unit on or off from your workstation

Set the schedule from your workstation and

Operate the unit safely

This section gives you the basic information and outlines a procedure to set up the unit for network control.

Set up the Unit for Network Control To control the MicroTech III Unit Controller over the network, set the Control Mode function to AUTO from the unit keypad. The keypad password (2526) is required to edit this function. For a detailed description of how to use the keypad, refer to MicroTech III Unit Controller Operation Manual (OM 920).

Display Important Data Points Typical workstation displays of MicroTech III Unit Controller attributes include the following significant data points (page number of detailed description in parenthesis). Each data point is identified with a number that also identifies it in the Comprehensive Data Point Tables. These data points are also shaded in the comprehensive tables so that you can distinguish them from the rest of the data points in the table. References in the text of this section also identify these data points with a number and shading.

Table 3. Significant Data Points

No Configuration No Temperatures/Pressures No Setpoints No Clear Alarms

1 Unit State (76) 5 Discharge Air Temperature (34)

9 Duct Static Pressure Setpoint (35)

14 Clear Alarms (85)

2 Application Mode (28)

6 Return Air Temperature (70)

10 Unoccupied Cooling Setpoint (77)

3 Occupancy (58) 7 Outdoor Air Temperature (63)

11 Occupied Cooling Setpoint (61)

4 Occupancy Mode (59)

8 Duct Static Pressure (35) 12 Occupied Heating Setpoint (62)

13 Unoccupied Heating Setpoint (78)

You can display any number of additional data points based on job requirements or individual preference. See LONWORKS Variables for lists of all LONWORKS Variables available to a LONWORKS network. See BACnet Standard Objects on page 19 for a list of all Standard BACnet Objects available to a BACnet network. For a more detailed description of all available data points, see the Detailed Data Point Information section.

Network Off The unit can be turned off over the network by writing to the Application Mode. Writing AUTO to Application Mode allows the unit controller to determine its mode of operation based on input conditions. Writing OFF to Application Mode shuts down the unit, etc.

The Emergency Override Mode Flag can also be used to shut down the unit from the network.

Network Occupancy Scheduling Using the keypad, set the Occupancy Mode to Auto. Schedule unit operation over the network with the Occ Scheduler input. Switching from OCC, UNOCC, BYPASS (TntOvrd), or AUTO commands the unit into the mode you select.

ED15112-8 17

Alarms Alarms in a MicroTech III Unit Controller are divided into three classes: Faults, Problems, and Warnings.

Fault Alarms have the highest priority.

Problem Alarms have medium priority.

Warning Alarms have the lowest priority.

Notification

BACnet

MicroTech III Unit Controllers may have their alarms monitored by one of four methods: 1) individually by BACnet Binary Values, 2) Alarm value using one BACnet Analog Value, 3) Alarm class, or 4) Notification Classes.

1. To monitor alarms individually, read the Present_Value of the desired Binary Value object. Each alarm has its own Binary Value object. If the Present_Value is Inactive (0), the alarm is not active. If the Present_Value is Active (1), the alarm is active.

2. To monitor alarms by alarm value, read the Present_Value property of the Alarm Value Analog Value object. The Present_Value displays a value that corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed. For example, if there is a simultaneous Dirty Filter Warning (value of 24) and a Freeze Fault (value of 252), then the Freeze Fault value of 252 will display in the Present_Value because it is the higher priority alarm of the two. Once the Freeze Fault condition is corrected and the fault is cleared, the next priority active alarm value (in this example, value of 24 for Dirty Filter alarm) is displayed. The values for all alarms are described in the Alarms section tables. If the Present_Value displays a zero, there are no active alarms.

3. To monitor alarms by alarm class, read the Present_Value of the appropriate Analog Value object (Warnings, Problems and Faults). The Present_Value displays a value that corresponds to the highest priority alarm that is active for that particular alarm class. It is possible to have multiple active alarms, but only the highest priority is displayed.

4. To monitor alarms using the Notification Class objects, see the Alarm Notification section.

LONWORKS

MicroTech III Unit Controllers may have their alarms monitored by one of two methods: 1) by using the In_alarm attribute of nvoUnitStatus or 2) by alarm class.

1. Alarms within MicroTech III Unit Controllers can be monitored individually by using the In Alarm attribute of the Unit Status Network Variable Output (i.e. nvoUnitStatus_in_alarm). This attribute displays a value that corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed in this attribute. For example, if there is a simultaneous Dirty Filter Warning (value of 24) and a Freeze Fault (value of 252), then the Freeze Fault value of 252 will display in nvoUnitStatus_in_alarm because it is the higher priority alarm of the two. Once the Freeze Fault condition is corrected and the fault is cleared, the next priority active alarm value (in this example, value of 24 for Dirty Filter alarm) is displayed. The values for all alarms are described in the Alarms section tables. If the attribute nvoUnitStatus_in_alarm displays a zero, there are no active alarms.

When the nvoUnitStatus_in_alarm attribute reads a value in the range of 1 to 99, a Warning Alarm is active. When the attribute reads a value in the range of 100 to 199, a Problem Alarm is active. When the attribute reads a value in the range of 200 to 255, a Fault Alarm is active.

2. To monitor alarms by alarm class, read nvoWarnAlarm, nvoProbAlarm and nvoFaultAlarm. The value corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed.

Clearing

BACnet

MicroTech III Unit Controllers have one Multi-State Value objects that can be used to clear alarms. All alarms of a particular class may be cleared by writing the appropriate value to the Present Value property of ClearAlarms (2=ClearAllFaults, 3=ClearAllProblems, 4=ClearAllWarnings). All alarms of all three classes can be cleared by writing a 5 (ClearAllAlarms) to Present_Value. Once the alarms are cleared, the Present_Value of this object goes back to None (1).

LONWORKS

MicroTech III Unit Controllers have one variable that can be used to clear alarms; nviClearAlarms. All alarms of a particular class may be cleared by writing the appropriate value to nviClearAlarms (1=ClearAllFaults, 2=ClearAllProblems,

18 ED15112-8

3=ClearAllWarnings). All alarms of all three classes can be cleared by writing a 4 (ClearAllAlarms) to nviClearAlarms. Once the alarms are cleared, this variable goes back to None (0).

Unit Controller Sequence of Operation The sequence of operation for a MicroTech III Unit Controller depends on the control type. Refer to the MicroTech III Unit Controller Operation Manual (OM 920) for sequence of operation details, including keypad operation.

ED15112-8 19

Comprehensive Data Point Tables

These comprehensive data point tables contain the significant parameters of specific data points. The shaded data points with numbers are the data points listed in Table 3.

BACnet Standard Objects Network Control Property

(Keypad attributes available as BACnet Standard Objects for network control of the unit) P

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Unit Status/Settings

Unit State 76 R MSV 15 1=Off, 2=Start, 3=Recirc, 4=FanOnly, 5=MinDAT, 6=Htg, 7=Econo, 8=Clg

McQuay AHU Unit Status 53 R MSV 1 Mode: 1=Enabled, 2=OffMan, 3=OffManCtrl, 4=OffNet, 5=OffAlm, 6=OffFanRetry

Cooling Status 32 R MSV 2 1=Enabled, 2=None, 3=OffAmb, 4=OffAlarm, 5=OffNet, 6=OffMan

Heating Status 45 R MSV 4 1=Enabled, 2=None, 3=OffAmb, 4=OffAlarm (Not Used), 5=OffNet, 6=OffMan

Economizer Status 37 R MSV 3 1=Enabled, 2=None, 3=OffAmb, 4=OffAlarm (Not Used), 5=OffNet, 6=OffMan

Cooling Capacity 32 R AV 1 cooling capacity (%)

Heating Capacity 44 R AV 2 heating capacity (%)

Supply Fan Capacity 74 R AI 8 Current supply fan capacity (%)

Return/Exhaust Fan Capacity 70 R AI 10 Current return or exhaust fan capacity (%)

Economizer Capacity 36 R AV 15 Feedback value (%)

Emergency Override 39 W MSV 10 1=Normal, 2=Off (Shuts unit off via a network signal, puts Unit Status = OffNet)

Application Mode1 28 W MSV 5 1=Off, 2=HeatOnly, 3=CoolOnly, 4=FanOnly, 5=Auto, 6=NA

Applies only when Ctrl Mode=Auto

Occupancy

Occupancy 58 R MSV 6 1=Occ, 2=Unocc, 3=TntOvrd

Occupancy Mode 59 W MSV 7 1=Occ, 2=Unocc, 3=TntOvrd, 4=Standby (not used) 5=Auto.

Temperatures

Control Temperature 32 R AI 14 Current reading of sensor

Discharge Air Temperature 34 R AI 1 Current reading of sensor

Return Air Temperature 70 R AI 2 Current reading of sensor

Space Temperature 73 R AI 3 Current reading of sensor

Outdoor Air Temperature 63 R AI 4 Current reading of sensor

Entering Fan / Leaving Coil Temp 40 R AI 7 Current reading of sensor

Entering Water Temperature 42 R AI 6 Current reading of sensor

Mixed Air Temperature 55 R AI 5 Current reading of sensor

Flow Status

Exhaust Fan Status 71 R BV 1 0=Off, 1=On

VAV Box Output 78 R MSV 14 N/A 1=Heat (Off), 2=Cool (On)

SAF Spd Control

Duct Static Pressure 35 R AV 6 N/A Current reading of sensor. If unit has two sensors the lower of the two is displayed

Duct Static Pressure Setpoint 35 W AV 7 N/A Default = 1.00” WC

Remote Supply Fan Capacity Control Flag

69 W MSV 11 1=DSP, 2=Speed, 3=Space

Supply Fan Capacity Input1 75 W AV 21 N/A Default = 163.835 (Null)

Applies only when MSV11=Speed (2)

RF/EF Spd Control

Building Static Pressure 30 R AI 9 Current reading of sensor value

Building Static Pressure Setpoint 30 W AV 8 Default = 0.050” WC

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Network Control Property


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Remote Return/Exhaust Fan Capacity Control Flag

68 W MSV 12 1=None, 2=Tracking, 3=BldgP, 4=Speed, 5=OAD

Return Fan Capacity Input1 71 W AV 22 Default = 163.835 (Null)

Applies only when MSV 12=Speed (4)

Exhaust Fan Capacity Input1 43 W AV 23 Default = 163.835 (Null)

Applies only when MSV 12=Speed (4)

Cooling

Occupied Cooling Setpoint 61 W AV 9 Default = 72°F / 22.22°C

Unoccupied Cooling Setpoint 77 W AV 10 Default = 85°F / 29.44°C

Network Discharge Air Cooling Setpoint

56 W AV 13 N/A Default = 55°F / 12.75°C

Applies only when ClgReset=Network

Min Discharge Air Cooling Setpoint 54 W AV 14 N/A Default = 55°F / 12.75°C

Zone Temp Set-Up

Control Temp Source 31 W MSV 39 1=RAT (NA on 100%OA Unit)

2=Space

3=MAT (Applicable on UnitType=SCU and ControlType=DAT only)

4=OAT (Applicable on ControlType=DAT only)

Evap Cond Set-Up

Conductivity 31 R AI 12 This variable provides the conductivity of the water in the sump of an evaporative cooled condenser.

Min OA Set-Up

Space CO2 72 R AI 13 This variable provides the concentration of CO2 in the space (PPM).

Outdoor Airflow 64 R AV 42

Outdoor Airflow Setpoint 64 W AV 53 Default = 2000 CFM/943.9 1/s

Heating

Occupied Heating Setpoint 62 W AV 11 Default = 68°F / 20°C

Unoccupied Heating Setpoint 78 W AV 12 Default = 55°F / 12.78°C

Network Discharge Air Heating Setpoint

56 W AV 17 N/A Default = 100°F / 37.78°C

Applies only when Htg Reset=Network

Max Discharge Air Heating Setpoint 53 W AV 18 N/A Default = 120°F / 48.89°C

Dehumidification

Relative Humidity 67 R AI 11 Displays value of optional relative humidity sensor

Dew Point Temperature 34 R AV 20 Indicates current calculated dew point

Relative Humidity Setpoint 68 W AV 40

Dew Point Setpoint 33 W AV 41

Reheat Capacity 67 R AV 44 0-100%

Energy Rec Set-Up

ER Discharge Air Temperature 40 R AI 16 Indicates current value of Energy Recovery Wheel discharge air tempearautre sensor

ER Exhaust Air Temperature 40 R AI 17 Indicates current value of Energy Recovery Wheel exhaust air temparatue sensor

ER Wheel Status 41 R MSV 37 Energy Recovery Wheel On/Off Command Status, 0=Off, 1=On

ER Wheel Speed 41 R AI 15 Current Energy Recovery Wheel Speed (%)

Setup: IP or MS/TP

Receive Heartbeat 66 W AV 43 Default is 0 seconds. This disables this feature. As of Application version 2506017300, this point is no longer used.

Unit Support 77 W MSV 16 1 = SI, 2 = English

Network Variables

Outdoor Air Temperature Input1 63 W AV 29 Network input of Outdoor Air Temp (–50°F to 150°F, -45.56°C to 65.56°C )

Default = 327.67 (Null). This parameter reverts to the Null

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value if written out of range.

Space Temperature Input1 73 W AV 28 Network input of Space Temp (0°F to 150°F, -17.78°C to 65.56°C )

Default = 327.67 (Null). This parameter reverts to the Null value if written out of range.

MSV 8 1=Occ, 2=Unocc, 3=TntOvrd (not used), 4=Standby (not used), 5=Auto (default).

MSV 9 1=Occ, 2=Unocc, 3=TntOvrd (not used), 4=Standby (not used), 5=Auto (default).

Occupancy Scheduler Input1

Current State

Next State

Time To Next State

60 W

AV 3

Default = 65535.0 (Null)

Primary Cool Enable1 64 W AV 34 & 35 Allows the network to partially or completely disable cooling.


Primary Heat Enable1 65 W AV 36 & 37 Allows the network to partially or completely disable heating.


Economizer Enable1 36 W AV 32 & 33 Allows the network to partially or completely disable economizer functions.

Waterflow Switch Input1 80 W AV 38 Allows the network to set the waterflow status. 0=No Flow, 1=Flow.

Space IAQ Input1 73 W AV 31 This input may be set by the network and is used for minimum OA damper control (0-5000 PPM). Default=32767 (Null)

Relative Humidity Input1 68 W AV 19 Network relative humidity value. Default=163.835 (Null)

Outdoor Air Damper Min Position Input

62 W AV 16 Current OA damper min position setpoint (%)

Applies only when OA Reset=Network

Eff Discharge Air Temp Setpoint 38 R AV 39 N/A This parameter will equal the Effective Heating Discharge Temperature Setpoint if the unit is in the heating state. Otherwise, it will equal the Effective Cooling Discharge Temperature Setpoint.

AHU Loc/Net 28 R MSV 38 This parameter is writable via the unit keypad display only. It must be set to Network for most of the writable network properties to apply (applicable parameters in this table denoted with a “1”).

1=Network, 2=Local

Active Alarms

Clear Alarms 85 W MSV 13 1=None, 2=ClrFlts, 3=ClrPrblms, 4=ClrWrngs, 5=ClrAllAlms

Version Information

Application Version 30 R Device * Read the Application_Software_Version property. This is the version of the software loaded in the MTIII unit controller.

Non-Keypad Items

Local Space Temperature 49 R AV 4 Current reading of the local sensor

Local OA Temperature 48 R AV 5 Current reading of the local sensor

Notification Class - Faults 86 W NC 1 Generates notifications for fault alarms.

Notification Class - Problems 87 W NC 2 Generates notifications for problem alarms.

Notification Class - Warnings 88 W NC 3 Generates notifications for warning alarms.

Warning Alarm 90 R AV 24 0=No Active Warnings, 24=Dirty Filter, 28=Airflow Sw, 32=Conductivity

Problem Alarm 91 R AV 25 0=No Active Problems, 137=Waterflow Sw, 140=Water Regulating Valve, 154=Low Pressure – Circuit 6, 155=Low Pressure – Circuit 5, 156=Low Pressure – Circuit 4, 157=Low Pressure – Circuit 3, 158=Low Pressure – Circuit 2, 159=Low Pressure – Circuit 1, 162=High Pressure – Circuit 6, 163=High Pressure – Circuit 5, 164=High Pressure – Circuit 4, 165=High Pressure – Circuit 3, 166=High Pressure – Circuit 2, 167=High Pressure – Circuit 1, 169=Sump Pump Fail, 179=EFT_LCT Problem, 182=Return Air Sensor Problem, 185=Space Sensor Problem, 188=OAT Sensor Problem, 191=EWT Problem, 194=MAT Problem, 197=Freeze Problem, 199=HeatFail Problem

Fault Alarm 92 R AV 26 0=No Active Faults, 208=Airflow Fault, 212=Low Discharge Air Temp, 216=High Discharge Air Temp , 220=High Return

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Air Temp, 224=Duct High Limit, 228=Discharge Sensor Fail, 244=Control Temp Fault, 250=Emergency Stop Fault, 252=Freeze Fault

Alarm Value 88 R AV 27 0=No Active Warnings, 24=Dirty Filter, 28=Airflow Sw, 32=Conductivity, 137=Waterflow Sw, 140=Water Regulating Valve, 154=Low Pressure – Circuit 6, 155=Low Pressure – Circuit 5, 156=Low Pressure – Circuit 4, 157=Low Pressure – Circuit 3, 158=Low Pressure – Circuit 2, 159=Low Pressure – Circuit 1, 162=High Pressure – Circuit 6, 163=High Pressure – Circuit 5, 164=High Pressure – Circuit 4, 165=High Pressure – Circuit 3, 166=High Pressure – Circuit 2, 167=High Pressure – Circuit 1, 169=Sump Pump Fail, 179=EFT_LCT Problem, 182=Return Air Sensor Problem, 185=Space Sensor Problem, 188=OAT Sensor Problem, 191=EWT Problem, 194=MAT Problem, 197=Freeze Problem, 199=HeatFail Problem, 208=Airflow Fault, 212=Low Discharge Air Temp, 216=High Discharge Air Temp , 220=High Return Air Temp, 224=Duct High Limit, 228=Discharge Sensor Fail, 244=Control Temp Fault, 250=Emergency Stop Fault, 252=Freeze Fault

Airflow Fault 93 R BV 27 0=normal, 1=Alarm

Airflow Switch Warning 93 R BV 2 0=normal, 1=Alarm

Conductivity Warning 94 R BV 3 0=normal, 1=Alarm

Control Temp Fault 94 R BV 28 0=normal, 1=Alarm

Dirty Filter Warning 94 R BV 4 0=normal, 1=Alarm

Discharge Sensor Fault 95 R BV 29 0=normal, 1=Alarm

Duct High Limit Fault 95 R BV 30 0=normal, 1=Alarm

Emergency Off Fault 95 R BV 31 0=normal, 1=Alarm

Entering Fan Temp / Leaving Coil Temp Problem

96 R BV 5 0=normal, 1=Alarm

Entering Water Temp Problem 96 R BV 6 0=normal, 1=Alarm

Freeze Fault 97 R BV 32 0=normal, 1=Alarm

Freeze Problem 97 R BV 7 0=normal, 1=Alarm

Heat Fail Problem 97 R BV 38 0=normal, 1=Alarm

High Discharge Temp Fault 97 R BV 33 0=normal, 1=Alarm

High Pressure Circuit 1 Problem 98 R BV 8 0=normal, 1=Alarm








High Return Temp Fault 100 R BV 34 0=normal, 1=Alarm

Low Discharge Temp Fault 101 R BV 35 0=normal, 1=Alarm

Low Pressure Circuit 1 Problem 102 R BV 14 0=normal, 1=Alarm








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Mixed Air Temp Problem 105 R BV 20 0=normal, 1=Alarm

Outdoor Temp Problem 106 R BV 21 0=normal, 1=Alarm

Return Temp Problem 106 R BV 22 0=normal, 1=Alarm

Space Temp Problem 106 R BV 23 0=normal, 1=Alarm

Sump Water Level Problem 107 R BV 24 0=normal, 1=Alarm

Waterflow Switch Problem 107 R BV 25 0=normal, 1=Alarm

Water Regulating Valve Problem 108 R BV 26 0=normal, 1=Alarm

Airflow Switch (Fault) 29 R BI 1 0=Open, 1=Closed

Airflow Swich (Warning) 29 R BI 2 0=Open, 1=Closed

Dirty Filter Switch 34 R BI 3 0=Open, 1=Closed

Heat Fail Input 44 R BI 23 0=Normal, 1=Alarm

High Pressure Circuit 1 Switch 45 R BI 4 0=Open, 1=Closed








Low Pressure Circuit 1 Switch 50 R BI 10 0=Open, 1=Closed








Sump Pump Water Level Switch 74 R BI 16 0=Open, 1=Closed

Water Flow Switch 79 R BI 17 0=Open, 1=Closed

Water Regulating Valve 79 R BI 18 0=normal, 1=Alarm

Freeze Switch (Fault) 43 R BI 19 0=Open, 1=Closed

Freeze Switch (Problem) 43 R BI 20 0=Open, 1=Closed

Duct High Limit Switch 35 R BI 21 0=Open, 1=Closed

Emergency Off Switch 39 R BI 22 0=Open, 1=Closed

1 MSV 38 (AHU Loc/Net) must be set to Network (1) for this propertly to apply. AHU Loc/Net is changeable only via the keypad display.

Note: Objects that appear in multiple locations on the keypad are only listed in the location they first appear on the keypad. Not all menus and items shown here will appear on keypad depending upon the specific unit configuration. Those that do not appear are not applicable to the unit.

24 ED15112-8

LONWORKS Variables Network Control Property

Keypad attributes available as LONWORKS Variables for network control of the unit

Page Variable Name SNVT/SCPT

Index SCC DAC Description

System

Unit State 76 nvoUnitStatus 112 Mode 0=AUTO, 1=HEAT, 2=MRNG_WRMUP, 3=COOL, 6=OFF, 9=FAN_ONLY, 10=FREE_COOL, 0XFF=NUL

McQuay AHU Unit Status 53 nvoMcQAHUStatus N/A Mode: 0=Enabled, 1=OffManCtrl, 2=OffMan, 3=OffNet, 4=OffAlm, 5=OffFanRetry

Cooling Status 32 nvoMcQAHUStatus N/A 0=Enabled, 1=None, 2=Off Amb, 3=Off Alarm, 4=Off Net, 5=Off Man

Heating Status 45 nvoMcQAHUStatus N/A 0=Enabled, 1=None, 2=Off Amb, 3=Off Alarm (Not Used), 4=Off Net, 5=Off Man

Economizer Status 37 nvoMcQAHUStatus N/A 0=Enabled, 1=None, 2=Off Amb, 3=Off Alarm (Not Used), 4=Off Net, 5=Off Man

Cooling Capacity 32 nvoUnitStatus 112 nvoUnitStatus.cool_output(%)

Heating Capacity 43 nvoUnitStatus 112 nvoUnitStatus.heat_output_primary(%)

Supply Fan Capacity 74 nvoUnitStatus 112 Fan_Output Current supply fan capacity (%)

Return/Exhaust Fan Capacity 70 nvoExhFanStatus 95 Current return or exhaust fan capacity (%)

Economizer Capacity 36 nvoUnitStatus 112 Economizer_Output Feedback value (%)

Emergency Override 39 nviEmergOverride 103 0=NORMAL, 4=SHUTDOWN, 0xFF=NUL (other states not used)

Application Mode 28 nviApplicMode 108 0=AUTO, 1=HEAT, 3=COOL, 6=OFF, 9=FAN_ONLY (other states not used)

Occupancy

Occupancy 58 nvoEffectOccup 109 0=OCCUPIED, 1=UNOCCUPIED, 2=BYPASS, 3=STANDBY, 0xFF=NUL

Occupancy Mode 59 nviOccManCmd 109 0=OCCUPIED, 1=UNOCCUPIED, 2= BYPASS, 3=STANDBY, 0xFF=NUL

Temperature

Discharge Air Temperature 34 nvoDischAirTemp 105 Current reading of sensor

Return Air Temperature 70 nvoRATemp 105 Current reading of sensor

Space Temperature 73 nvoSpaceTemp 105 Current reading of sensor

Outdoor Air Temperature 63 nvoOutdoorTemp 105 Current reading of sensor

Entering Fan / Leaving Coil Temp 40 nvoEFT_LCT 105 Current value of sensor

Entering Water Temperature 42 nvoCWTemp 105 Current value of sensor

Mixed Air Temperature 55 nvoMATemp 105 N/A Current value of sensor

Mixed Air Temperature 55 nvoMixedAirTemp 105 N/A Current value of sensor

Flow Summary

Return/Exhaust Fan Status 71 nvoExhFanStatus 95 State: 0=Off, 1=On , -1(0xFF)=Undefined

VAV Box Output 80 nvoVAVBoxOut N/A N/A 0=Heat (Off), 1=Cool (On)

SAF Spd Control

Duct Static Pressure 35 nvoDuctStatPress 113 N/A Current reading of sensor. If unit has two sensors the lower of the two is displayed

Duct Static Pressure Setpoint 35 nviDuctStaticSP 113 N/A Default = 1.00” WC

Remote Supply Fan Cap Control Flag 69 nviSupFanCtrl N/A 0=Duct Press, 1=Speed

Supply Fan Capacity Input 75 nviSupFanCap 81 N/A Default = 25% Sets the discharge air VFD speed when Supply Fan Capacity Control Flag is set to Speed

RF/EF Spd Control

Building Static Pressure 30 nvoBldgStatPress 113 Current reading of sensor value

Building Static Pressure Setpoint 30 nviBldgStaticSP 113 Default = 0.050” WC

Remote Return/Exhaust Fan Cap Control Flag

68 nviExhRetFanCtrl N/A 0=None, 1=Tracking, 2=Bldg Press, 3=Speed

ED15112-8 25





Return Fan Capacity Input 71 nviRetFanCap 81

Exhaust Fan Capacity Input 43 nviExhFanCap 81

Cooling

Occupied Cooling Setpoint 61 nciSetpoints SCPTsetPnts

106/60 Occupied_Cool Default = 72°F / 22.22°C

Unoccupied Cooling Setpoint 77 nciSetpoints SCPTsetPnts

106/60 Unnoccupied_Cool Default = 85°F / 29.44°C

Discharge Air Cooling Setpoint 56 nviDAClSP 105 N/A Default = 55°F (32-86°F) / 12.78°C

Minimum Discharge Air Cooling Setpoint

54 nciDAClSP 105 N/A Used to set the discharge air cooling setpoint via the network.

Evaporator Condensing

Conductivity 31 nvoConductivity N/A This variable provides the conductivity of the water in the sump of an evaporative cooled condener.

Min OA Damper

Space CO2 72 nvoSpaceCO2 29 0-5000ppm

Outdoor Airflow 64 nvoOAFlow 15

Heating

Occupied Heating Setpoint 62 nciSetpoints SCPTsetPnts

106/60 Occupied_Heat Default = 68°F / 20°C

Unoccupied Heating Setpoint 78 nciSetpoints SCPTsetPnts

106/60 Unoccupied_Heat Default = 55°F / 12.78°C

Discharge Air Heating Setpoint 56 nviDAHtSP 105 N/A Default = 100°F (50-158°F) / 37.78°C

Maximum Discharge Air Heating Setpoint

53 nciDAHtSP 184 N/A

Dehumidification

Relative Humidity 67 nvoSpaceRH 81 Value of optional relative humidity sensor or network input

Dew Point Temperature 33 nvoSpaceDewPt 105 Indicates current calculated dew point (calculated from Relative Humidity)

Relative Humidity Setpoint 68 nviSpaceDehumSP 81

Dew Point Setpoint 33 nviSpaceDewPtSP 105

Reheat Capacity 67 nvoUnitStatus 112 nvoUnitStatus.heat_output_secondary(%)

LONWORKS Setup

Receive Heartbeat 66 nciRcvHrtBt SCPTmaxRcvTime

107/48 Default is 0 seconds

Send Heartbeat 72 nciSndHrtBt SCPTmaxSendTime

107/49 Default is 60 seconds

Network Variables

Outdoor Air Temperature Input 63 nviOutdoorTemp 105 Network input of Outdoor Air Temp (–10°C to 50°C)

Space Temperature Input 73 nviSpaceTemp 105 Network input of Space Temp (–10°C to 50°C)

Occupancy Scheduler Input 60 nviOccSchedule 128 Network schedule

Primary Cool Enable 64 nviPriCoolEnable 95 Enables or disables cooling via two properties:

State=0, cooling disabled

State=1 and Value=0, cooling disabled

State=1 and Value>0, cooling enabled

State=-1, network is not cooling economizer

Primary Heat Enable 65 nviPriHeatEnable 95 Enables or disables heating via two properties:

State=0, heating disabled

State=1 and Value=0, heating disabled

State=1 and Value>0, heating enabled

State=-1, network is not effecting heating

Economizer Enable 36 nviEconEnable 95 Enables or disables economizer via two properties:

State=0, economizer disabled

State=1 and Value=0, economizer disabled

26 ED15112-8





State=1 and Value>0, economizer enabled

State=-1, network is not effecting economizer

Waterflow Switch Input 80 nviCWFlow 95

Space IAQ Input 73 nviSpaceIAQ 29 This input may be set by the network and is used for minimum OA damper control (0-5000 PPM).

Relative Humidity Input 68 nviSpaceRH 81 Network input

Temperature Setpoint Input 75 nviSetpoint 105 Adjusts effective heat enable and effective cool enable setpoint via the network. Effective Heat SP = nviSetpoint – 0.5 (Occupied_Cool – Occupied_Heat). Effective Cool SP = nviSetpoint + 0.5 (Occupied_Cool – Occupied_Heat).

Outdoor Air Damper Min Position Input

62 nviOAMinPos 81 Current OA damper min position setpoint (%)

Effective Enable Setpoint 38 nvoEffectSetpt 105 Current enable setpoint which the unit will use.

HVAC Unit Type Identifier 45 nciHvacType SCPThvacType

145/169 N/A Equipment Type = HVT_GENERIC (Read Only)

Active Alarms

Clear Alarms 85 nviClearAlarms N/A 0=None, 1=Clear All Faults, 2=Clear All Problems, 3=Clear All Warnings, 4=Clear All Alarms

Non-Keypad Variables

Local Space Temperature 49 nvoLocalSpaceTmp 105 Current reading of the local space sensor

Local OA Temperature 48 nvoLocalOATemp 105 Current reading of the local outdoor air temperature sensor

Effective Discharge Setpoint 38 nvoEffDATempSp 105 N/A Current discharge air setpoint which the unit will use.

Minimum Send Time 55 nciMinOutTm SCPTminSendTime

107/52 Defines min period of time between automatic network variable output time (reducing traffic on network)

Warning Alarm 90 nvoWarnAlarm N/A 0=No Active Warnings, 24=Dirty Filter, 28=Airflow Sw, 32=Conductivity

Problem Alarm 91 nvoProbAlarm N/A 0=No Active Problems, 137=Waterflow Sw, 140=Water Regulating Valve, 154=Low Pressure – Circuit 6, 155=Low Pressure – Circuit 5, 156=Low Pressure – Circuit 4, 157=Low Pressure – Circuit 3, 158=Low Pressure – Circuit 2, 159=Low Pressure – Circuit 1, 162=High Pressure – Circuit 6, 163=High Pressure – Circuit 5, 164=High Pressure – Circuit 4, 165=High Pressure – Circuit 3, 166=High Pressure – Circuit 2, 167=High Pressure – Circuit 1, 169=Sump Pump Fail, 179=EFT_LCT Problem, 182=Return Air Sensor Problem, 185=Space Sensor Problem, 188=OAT Sensor Problem, 191=EWT Problem, 194=MAT Problem, 197=Freeze Problem

Fault Alarm 92 nvoFaultAlarm N/A 0=No Active Faults, 208=Airflow Fault, 212=Low Discharge Air Temp, 216=High Discharge Air Temp , 220=High Return Air Temp, 224=Duct High Limit, 228=Discharge Sensor Fail, 244=Control Temp Fault, 250=Emergency Stop Fault, 252=Freeze Fault

Alarm Value 88 nvoUnitStatus 112 0=No Active Alarms, 24=Dirty Filter, 28=Airflow Sw, 32=Conductivity, 137=Waterflow Sw, 140=Water Regulating Valve, 154=Low Pressure – Circuit 6, 155=Low Pressure – Circuit 5, 156=Low Pressure – Circuit 4, 157=Low Pressure – Circuit 3, 158=Low Pressure – Circuit 2, 159=Low Pressure – Circuit 1, 162=High Pressure –

ED15112-8 27





Circuit 6, 163=High Pressure – Circuit 5, 164=High Pressure – Circuit 4, 165=High Pressure – Circuit 3, 166=High Pressure – Circuit 2, 167=High Pressure – Circuit 1, 169=Sump Pump Fail, 179=EFT_LCT Problem, 182=Return Air Sensor Problem, 185=Space Sensor Problem, 188=OAT Sensor Problem, 191=EWT Problem, 194=MAT Problem, 197=Freeze Problem, 208=Airflow Fault, 212=Low Discharge Air Temp, 216=High Discharge Air Temp , 220=High Return Air Temp, 224=Duct High Limit, 228=Discharge Sensor Fail, 244=Control Temp Fault, 250=Emergency Stop Fault, 252=Freeze Fault

Object Status 57 nvoStatus 92 This variable is part of the Node Object and reports the status of the requested functional block in the device.

Object Request 56 nviRequest 93 This variable is part of the Node Object and requests a particular mode for a particular functional block in the device. Only the required RQ_NORMAL, RP_UPDATE_STATUS AND RQ_REPORT_MASK are implemented.

Note: Objects that appear in multiple locations on the keypad are only listed in the location they first appear on the keypad. Not all menus and items shown here will appear on keypad depending upon the specific unit configuration. Those that do not appear are not applicable to the unit.

28 ED15112-8

Detailed Data Point Information

The data points or properties (attributes) defined in this section reference data that is generated in the MicroTech III Unit Controller.

AHU Loc/Net Keypad Menu Path Main Menu\BMS Communications\BACnet MSTP Set-Up\AHU Loc/Net= Main Menu\BMS Communications\BACnet IP Set-Up\AHU Loc/Net=

This read only attribute indicates whether the unit controller is set to use local or network inputs. AHU Loc/Net is only changeable at the keypad/display.

Measurement Units Data Type Valid Range Uses Heartbeat Default Value

State N/A BACnet: Unsigned

Enumerated N/A Network

BACnet Object Identifier Property


Multistate Value 19 38 Present_Value 85 Full Reference

<Device Name>.AHULoc/Net.Present_Value Enumeration

1 = Network 2 = Local

LonWorks No LONWORKS equivalent.

Application Mode Keypad Menu Path Main Menu\View/Set Unit\Unit Status/Settings\Net App Mode=

This read/write attribute sets the unit in an application mode (auto, off, heat only, cool only, or fan only). This attribute has no affect unless Control Mode is set to Auto. Control Mode is only set at the keypad/display.


Mode N/A BACnet: Unsigned LonWorks: Real

Enumerated Yes N/A




<Device Name>.ApplicCmd.Present_Value Enumeration

1= Off 2 = Heat 3= Cool 4= Fan Only 5= Auto 6= N/A

LONWORKS LONWORKS Name Profile Uses Heartbeat SNVT Type SNVT Index

nviApplicMode DAC, SCC Yes SNVT_hvac_mode 108

ED15112-8 29

Enumeration Definitions Value Identifier Notes

0 HVAC_AUTO Controller automatically changes between application modes

1 HVAC_HEAT Heating only

2 HVAC_MRNG_WRMUP Application-specific morning warm-up (Not Used)1

3 HVAC_COOL Cooling only

4 HVAC_NIGHT_PURGE Application-specific night purge (Not Used) 1

5 HVAC_PRE_COOL Application-specific pre-cool (Not Used) 1

6 HVAC_OFF Controller not controlling outputs

7 HVAC_TEST Equipment being tested (Not Used) 1

8 HVAC_EMERG_HEAT Emergency heat mode (heat pump) (Not Used) 1

9 HVAC_FAN_ONLY Air not conditioned, fan turned on

10 HVAC_FREE_COOL Cooling with compressor not running (Not Used) 1

11 HVAC_ICE Ice-making mode (Not Used) 1

12 HVAC_MAX_HEAT (Not Used) 1

13 HVAC_ECONOMY Controller automatically changes between application modes (Not Used) 1

14 HVAC_DEHUMID Controller automatically changes between application modes (Not Used) 1

0xFF HVAC_NUL Value not available

1. Writing to a state that is not used by the unit controller causes it to control as if HVAC_AUTO (0) was selected.

Airflow Switch (Fault) Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Airflow Switch (Closed (1) or Open (0)). The Off Normal state of this object indicates an Air Flow fault.

Measurement Units Data Type Valid Range Default Value

Alarm N/A Enumerated 0-1 N/A



Binary Input 3 1 Present_Value 85 Full Reference

<Device Name>.AirFlwSw.Present_Value Enumeration

0 – Open 1 – Closed

LONWORKS No LONWORKS equivalent.

Airflow Switch (Warning) Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Airflow Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates an Airflow Switch Warning.



30 ED15112-8




<Device Name>.AirFlwWrSw.Present_Value Enumeration



Application Version Keypad Menu Path Main Menu\About this AHU\App Version=

This read-only property identifies the version of application software loaded into the unit controller.


N/A N/A CharacterString N/A N/A



Device 8 Variable Application_Software_Version 12 Full Reference

<Device Name>. Application_Software_Version

Building Static Pressure Keypad Menu Path Main Menu\View/Set Unit\RF/EF Spd Controls\Bldg Press=

This read-only property displays the unit’s building static pressure. This variable only applies to units that have their return/exhaust fan method set to building pressure.


Pressure (gauge) IWC or Pa Real -0.2489 – +0.2489 IWC -62.0 .. 62.0 Pa

N/A



Analog Input 0 9 Present_Value 85 Full Reference

<Device Name>.BldgStatPress.Present_Value


nvoBldgStatPress DAC, McQuayRTU-SCC

Yes SNVT_temp_p 105

Building Static Pressure Setpoint Keypad Menu Path Main Menu\Quick Menu\BldgSP Spt= Main Menu\View/Set Unit\RF/EF Spd Controls\Bldg Press=

This read/write property sets the building static pressure setpoint used for controlling the return air or exhaust fan inlet VFD. The VFD is modulated to maintain the building static pressure sensor input at this Setpoint. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the controller continues to control to the last valid value. This variable only applies if the unit is configured for a modulating return/exhaust fan.

ED15112-8 31


Pressure (gauge) IWC or Pa Real -0.2489 – +0.2489 IWC -62.0 .. 62.0 Pa

Yes N/A



Analog Value 2 8 Present_Value 85 Full Reference

<Device Name>.BldgStaticSP.Present_Value


nviBldgStaticSP DAC, McQuayRTU-SCC

No SNVT_press_p 113

Conductivity Keypad Menu Path Main Menu\Commission Unit\Evap Cond Set-Up\Conductivity=

This read only property provides the conductivity of the water in the sump of an evaporative cooled condenser. This variable only applies to units with evaporative condensing.


Conductivity N/A Real 0-5000 N/A




<Device Name>.Conductivity.Present_Value

LONWORKS LonWorks Name Profile Uses Heartbeat UNVT Type SNVT Number

nvoConductivity McQuayDischargeAir, McQuayRTU-SCC

Yes UNVTconductivity N/A

Control Temp Source Keypad Menu Path Main Menu\Commission Unit\Zone Temp Set-Up\Ctrl Temp Src=

This read/write property selects the temperature sensor input to be used for the unit heating/cooling changeover or zone cooling and heating capacity change decisions. For example, if the CtrlTemp Src parameter is set to “Return,” then the Control Temp parameter reads the same value as the Return Air parameter.


Method N/A Unsigned Enumerated N/A




<Device Name>. CtlrTempSrc.Present_Value Enumeration

1=RAT (NA on 100%OA Unit) 2=Space 3=MAT (Applicable on UnitType=SCU and ControlType=DAT only) 4=OAT (Applicable on ControlType=DAT only)

32 ED15112-8

LONWORKS No LONWORKS equivalent

Control Temperature Keypad Menu Path Main Menu\Quick Menu\Control Temp= Main Menu\View/Set Unit\Temperatures\Control Temp=

This read-only property indicates the current control temperature.


Temperature °F / °C

Real -50.0–249.998°F -45.56°–121.11°C

N/A




<Device Name>.ControlTemp.Present_Value

LONWORKS No LONWORKS equivalent

Cooling Capacity Keypad Menu Path Main Menu\Quick Menu\Clg Capacity= Main Menu\View/Set Unit\Unit Status\Settings\Clg Capacity=

This read-only property indicates the current percentage of unit maximum cooling capacity. The BACnet property reads only the subject attribute; however the LONWORKS variable is only a part of the LONWORKS Unit Status network variable. See Page 76 for details of LONWORKS network variable. The BACnet property only applies to the subject data point. The LONWORKS variable covers six other data points: Unit State, Heating Capacity, Reheat Capacity, Supply Fan Capacity, Economizer Capacity, and In Alarm. This variable only applies if the unit is configured for cooling.


Percent % BACnet: Real LONWORKS: Structure

0-100% N/A




<Device Name>.ClgCapacity.Present_Value


nvoUnitStatus.cool_output DAC, SCC Yes SNVT_hvac_status 112

Cooling Status Keypad Menu Path Main Menu\View/Set Unit\Unit Status/Settings\Clg Status=

This read-only attribute indicates whether or not cooling is currently enabled. If cooling is disabled, the reason is indicated. Measurement Units Data Type Valid Range Default Value

State N/A BACnet: Unsigned LonWorks: Real

Enumerated N/A

ED15112-8 33




<Device Name>.ClgStatus.Present_Value Enumeration

1=Enabled 2=None 3=Off Amb 4=Off Alarm 5=Off Net 6=Off Man

LONWORKS LONWORKS Name Profile Uses Heartbeat UNVT Type SNVT Index

nvoMcQAHUStatus.ClgStatus McQuayDischargeAir, McQuayRTU-SCC

No UNVTmcQAHUStatus N/A

Enumeration

0=Enabled 1=None 2=Off Ambient 3=Off Alarm 4=Off Net 5=Off Man

Date Keypad Menu Path Main Menu\View/Set Unit\Date/Time/Schedules\Date=

This read/write property sets the current date of the form day, month, year, and day of the week.

Values Dates as BACnet date data types. See ANSI/ASHRAE 135-2004 for a definition of the data type.



Device 8 Variable Local_Date 56 Full Reference

<Device Name>.Local_Date

Dew Point Setpoint Keypad Menu Path Main Menu\View/Set Unit\Dehumidification\Dewpoint Spt=

This read/write property sets the Dew Point Setpoint via the network. Measurement Units Data Type Valid Range Uses Heartbeat Default Value


Real 0.0–100.0°F -17.78 - +37.78°C

No N/A




<Device Name>.DewpointSP.Present_Value


nviSpaceDewPtSP McQuayDischargeAir, McQuayRTU-SCC

No SNVT_temp_p 105

34 ED15112-8

Dew Point Temperature Keypad Menu Path Main Menu\View/Set Unit\Dehumidification\Dewpoint= This read-only attribute indicates the current dew point calculated from the current reading of the optional relative humidity sensor.



Real -50°–150°F -45.56°–65.56°C

N/A




<Device Name>.SpaceDewPt.Present_Value


nvoSpaceDewPt SCC, McQuayDischargeAir

Yes SNVT_temp_p 105

Dirty Filter Switch Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Dirty Filter Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Dirty Filter Warning.






<Device Name>.DirtyFilterSw.Present_Value Enumeration



Discharge Air Temperature Keypad Menu Path Main Menu\Quuick Menu\Disch Air= Main Menu\View/Set Unit\Temperatures\Disch Air=

This read-only property indicates the current reading of the unit discharge air temperature sensor.



Real -50.0–249.998°F -45.56°–121.11°C

N/A




<Device Name>.DischAirTemp.Present_Value

ED15112-8 35


nvoDischAirTemp DAC, SCC Yes SNVT_temp_p 105

Duct High Limit Switch Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Duct High Limit Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Duct High Limit Fault.






<Device Name>.DuctHiLmtSw.Present_Value Enumeration



Duct Static Pressure Keypad Menu Path Main Menu\Quick Menu\Duct Press= Main Menu\View/Set Unit\SAF Spd Control\Duct Press=

This read-only attribute indicates the current reading of the duct static pressure sensor. When a unit is equipped with two duct static pressure sensors, this attribute displays the lower of the two sensor readings. Static pressure control is then based on the lower of the two readings. This variable only applies to units that are configured for supply fan VFD’s.


Pressure (gauge) IWC / Pa Real 0.00–5.00 IWC 0–1250 Pa

N/A




<Device Name>.DuctStatPress.Present_Value

LonWorks LONWORKS Name Profile Uses Heartbeat SNVT Type SNVT Index

nvoDuctStatPress DAC Yes SNVT_press_p 113

Duct Static Pressure Setpoint Keypad Menu Path Main Menu\Quick Menu\DuctSP Spt= Main Menu\View/Set Unit\SAF Spd Control\DuctSP Spt=

This read/write property sets the Duct Static Pressure Setpoint used to control the discharge air fan VFD. If the Present Value is set beyond the valid limits from the network, the value written from the network is ignored. This variable only applies if the unit’s supply fan type is variable frequency drives (VFD).


Pressure (gauge) IWC / Pa

Real 0.20–4.00 IWC 49.82–996.36 Pa

No N/A

36 ED15112-8




<Device Name>.DuctStaticSP.Present_Value


nviDuctStaticSP DAC No SNVT_press_p 113

Economizer Capacity Keypad Menu Path Main Menu\Quick Menu\OAD/Econo Cap= Main Menu\View/Set Unit\Economizer\OAD/Econo Cap=

This read-only attribute indicates the current economizer capacity or outdoor air damper position. The BACnet property reads only the subject attribute; however the LONWORKS variable is only a part of the LONWORKS Unit Status network variable. See Unit State on page 76 for details of LONWORKS network variable. The BACnet property only applies to the subject data point. The LONWORKS variable covers six other data points: Unit State (See page 76), Cooling Capacity (See page 32), Heating Capacity (See page 43), Reheat Capacity (See page 67), Supply Fan Capacity (See page 74), and In Alarm (See page 88).


Percent Percent BACnet: Real LONWORKS: Structure

0-100% N/A




<Device Name>.EconCapacity.Present_Value


nvoUnitStatus.econ_output DAC, SCC Yes SNVT_hvac_status 112

Economizer Enable Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Ec Ena Sw= Main Menu\Service Menus\Network Input Status\Net Ec Ena Vl=

This read/write configuration property enables or disables the economizer. This variable only applies if the unit is configured for a waterside or airside economizer. In BACnet, if EconEnable is 0, then the economizer is disabled. If it is 1 and EconEnaPercent is 0, the economizer is disabled. If EconEnable is 1 and EconEnaPercent is greater than 0, the economizer is enabled. The LONWORKS point nviEconEnable has two properties; a State and a Value. When the State = 0, economizer control through the network is disabled. When State = 1, the Economizer can be controlled through the network. When the Value = 0 and the State = 1, the economizer is disabled through the LONWORKS network. When the Value is greater than 0 and the State = 1, the economizer is enabled through the LONWORKS network.


State N/A BACnet: Real LONWORKS: Structure

Enumerated Yes N/A

ED15112-8 37




<Device Name>.EconEnable.Present_Value




<Device Name>.EconEnablePct.Present_Value


nviEconEnable DAC, SCC Yes SNVT_switch 95

Valid Range

State Value Economizer

0 N/A Disabled

1 0 Disabled

1 1-100% Enabled

-1(0xFF) N/A Auto (invalid)

Economizer Status Keypad Menu Path Main Menu\View/Set Unit\Unit Status/Settings\EconoStatus=

This read-only attribute indicates whether or not the economizer is currently enabled. If the economizer is disabled, the reason is indicated.



Enumerated N/A




<Device Name>.EconoStatus.Present_Value Enumeration

1=Enabled 2=None 3=Off Amb 4=Off Alarm (Not Used) 5=Off Net 6=Off Man 7=Off Dehum

38 ED15112-8

LONWORKS LONWORKS Name Profile Uses Heartbeat UNVT Type SNVT Number

nvoMcQAHUStatus.EconStatus McQuayDischargeAir, McQuayRTU-SCC


Enumeration

0=Enabled 1=None 2=Off Amb 3=Off Alarm (Not Used) 4=Off Net 5=Off Man 6=Off Dehum

Effective Discharge Air Temperature Setpoint Keypad Menu Path No Keypad Equivalent

This read-only attribute reveals the effective discharge air temperature setpoint that the unit is using for control. This attribute is set equal to the Discharge Air Heating Temperature Setpoint (See page 56) when the unit is in the heating operating state and equal to the Discharge Air Cooling Setpoint (See page 56) when the unit is in any other operating state.



Fixed Point Scalar - signed long -83.2 .. +147.2°F -64.0 .. +64.0°C

N/A




<Device Name>.EffDATempSP.Present_Value


nvoEffDATempSp DAC Yes SNVT_temp_p 105

Effective Setpoint Output Keypad Menu Path Maiin Menu\Service Menus\Network Input Status\nvoEffSpt=

This read-only attribute monitors the effective temperature setpoint. It is always set equal to the current controlling setpoint depending on the current unit operating state (i.e. cooling or heating). The Effective Setpoint Output depends on the Occupied Cooling Setpoint, (see page 61) the Occupied Heating Setpoint, (see page 62) and Temperature Setpoint Input (see page 75.) If the Temperature Setpoint Input (nviSetpoint) is set to a valid value:

Effective Cooling Enable Setpoint = Temperature Setpoint Input +½(Occupied Cooling Enable Setpoint–Occupied Heating Enable Setpoint)

Effective Heating Enable Setpoint = Temperature Setpoint Input -½(Occupied Cooling Enable Setpoint–Occupied Heating Enable Setpoint)

The Effective Setpoint Output (nvoEffectSetpt) equals Effective Heating Enable Setpoint when the control temperature is less than Occupied Heating setpoint + [1/2(Occupied Cooling Enable Setpoint–Occupied Heating Enable Setpoint)]. It is set equal to the Effective Cooing Enable Setpoint when the control temperature is greater than the Occupied Cooling Enable Setpoint – [1/2(Occupied Cooling Enable Setpoint–Occupied Heating Enable Setpoint)].

If the Temperature Setpoint Input (nviSetpoint) is set to a invalid value:

Effective Cooling Enable Setpoint = Occupied Cooling Enable Setpoint

Effective Heating Enable Setpoint = Occupied Heating Enable Setpoint

ED15112-8 39



Real 0.0°-100.0°F -17.78°-37.78°C

N/A

BACnet No BACnet equivalent.

LONWORKS LONWORKS Name Profile Uses Heartbeat SNVT Type Number

nvoEffectSetpt SCC, McQuayDischargeAir

Yes SNVT_temp_p 105

Emergency Off Switch Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Emergency Off Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates an Emergency Off Fault.






<Device Name>.EmergencyOffSw.Present_Value Enumeration



Emergency Override Keypad Menu Path Main Menu\View/Set Unit\Unit Status/Settings\Emerg Mode=

This read/write property shuts off the unit controller. If this property is set to Off, the unit controller cannot start based on a time clock or any other means. The only way to start the unit controller is to change the value to Normal. If a value other than Off or EMERG_SHUTDOWN, is written, this variable reverts back to Normal.


N/A N/A BACnet: UnsignedLonWorks: Real

Enumerated No Normal




<Device Name>.EmergOverride.Present_Value Enumeration

1 = Normal 2 = Off


nviEmergOverride DAC, SCC No SNVT_hvac_emerg 103

40 ED15112-8

Enumeration Definitions

Value Identifier Notes

0 EMERG_NORMAL No emergency mode

1 EMERG_PRESSURIZE Emergency pressurize mode (not used)

2 EMERG_DEPRESSURIZE Emergency depressurize mode (not used)

3 EMERG_PURGE Emergency purge mode (not used)

4 EMERG_SHUTDOWN Emergency shutdown mode

5 EMERG_FIRE (not used)

0xFF EMERG_NUL Value not available

Enumeration Correspondence

BACnet Lon

1 Normal 0 EMERG_NORMAL

1 Normal 1 EMERG_PRESSURIZE

1 Normal 2 EMERG_DEPRESSURIZE

1 Normal 3 EMERG_PURGE

2 Off 4 EMERG_SHUTDOWN

1 Normal 5 EMERG_FIRE

1 Normal 0xFF EMERG_NUL

Energy Recovery Discharge Air Temperature Keypad Menu Path Main Menu\Commission Unit\Energy Rec Set-Up\ER DAT=

This read-only attribute indicates the current value of the energy recovery discharge air temperature sensor.



Real -50°–249.998°F -45.56°-121.11°C

N/A




<Device Name>.ERDAT.Present_Value


Energy Recovery Exhaust Air Temperature Keypad Menu Path Main Menu\Commission Unit\Energy Rec Set-Up\ER ExhT=

This read-only attribute indicates the current value of the energy recovery exhaust air temperature sensor.



Real -20°–199.994°F -28.89°-93.33°C

N/A




<Device Name>.ERExhTemp.Present_Value


ED15112-8 41

Energy Recovery Wheel Status Keypad Menu Path Main Menu\Commission Unit\Energy Rec Set-Up\Wheel==

This read-only attribute indicates the command status (On or Off) of the energy recovery wheel.


N/A N/A Unsigned Enumerated N/A



Multi-State Value 0 37 Present_Value 85 Full Reference

<Device Name>.ERWhlOnOff.Present_Value Enumeration

0 = Off 1 = On


Energy Recovery Wheel Speed Keypad Menu Path Main Menu\Commission Unit\Energy Rec Set-Up\Wheel Speed==

This read-only attribute indicates the current speed, as a percentage, of the energy recovery wheel.


Percentage

Real 0 –100% N/A




<Device Name>.ERWheelSpd.Present_Value


Entering Fan Temperature / Leaving Coil Temp Keypad Menu Path Main Menu\View/Set Unit\Temperatures\EFT/LC Temp=

This read-only attribute indicates the current value of the unit entering fan/leaving coil air temperature sensor. This variable only applies to units configured for an entering fan temperature sensor.



Real -83.2°–249.998°F -64.0°-121.11°C

N/A




<Device Name>.EFT_LCT.Present_Value

42 ED15112-8


nvoEFT_LCT DAC, SCC Yes SNVT_temp_p 105

Entering Water Temperature Keypad Menu Path Main Menu\Quick Menu\EW Temp= Main Menu\View/Set Unit\TemperaturesW Temp=

This read-only attribute indicates the current entering water temperature from the entering water temperature sensor. This variable only applies to Self-Contained units configured with a water condenser.



Real -50°–150°F -45.56°–65.56°C

N/A




<Device Name>.CWTemp.Present_Value


nvoCWTemp DAC, McQuayRTU-SCC

Yes SNVT_temp_p 105

Exhaust Fan Capacity Keypad Menu Path Main Menu\Quick Menu\RF/EF Capacity= Main Menu\View/Set Unit\Unit Status/Settings\RF/EF Capacity=

This read-only property indicates the current capacity of the exhaust fans.


Fan Status N/A BACnet: Real LONWORKS: Structure

Enumerated N/A



Analog Input 0 Present_Value 85 Full Reference

<Device Name>.ExhFanValue.Present_Value


nvoExhFanStatus.value DAC, McQuayRTU-SCC

Yes SNVT_switch 95

Field Definitions

Field Units Valid Range Notes

value % of Full Scale 0-100% 0-100%

state N/A 0, 1 0=Off, 1=On

ED15112-8 43

Exhaust Fan Capacity Input Keypad Menu Path Main Menu\Commission Unit\RF/EF Set-Up\Rem ExhF Cap=

This read/write property is used to override the local exhaust fan capacity control. EF Cap Ctrl must be set to Speed for the MicroTech III Unit Controller to use this remote capacity for control. This variable only applies to units that are configured for modulating exhaust fan or that are configured for prop exhaust.


Capacity Percent Real 0-100% Yes N/A




<Device Name>.ExhFanCapNetIn.Present_Value


nviExhFanCap DAC, McQuayRTU-SCC

Yes SNVT_lev_percent 81

Freeze Switch (Fault) Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Freeze Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Freeze Fault.






<Device Name>.FreezeFltSw.Present_Value Enumeration



Freeze Switch (Problem) Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Freeze Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Freeze Problem.



44 ED15112-8




<Device Name>.FreezeSw.Present_Value Enumeration



Heat Fail Input Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Heat Fail input from the McQuay gas heat flame safeguard (FSG) device. (Alarm (1) or Normal (0).





Binary Input 3 23 Present_Value Full Reference

<Device Name>.FSGAlarmSw.Present_Value Enumeration

0 – Normal 1 – Alarm


Heating Capacity Keypad Menu Path Main Menu\Quick Menu\Htg Capacity= Main Menu\View/Set Unit\Unit Status/Settings\Htg Capacity=

This read-only attribute indicates the current percentage of unit maximum heating capacity. The BACnet property reads only the subject attribute and only applies to the subject data point. The LONWORKS variable is only a part of the LONWORKS Unit Status network variable. See Unit State on page 76 for details of LONWORKS network variable. The LONWORKS variable covers six other data points: Unit State (See page 76), Supply Fan Capacity (See page 74), Secondary Heating (Reheat) Capacity (See page 67), Economizer Capacity (See page 36), and In Alarm (See page 88). This variable only applies to units configured with heating.


Heating Capacity Percent BACnet: Real LonWorks: Structure

0.0–100.0% N/A




<Device Name>.HtgCapacity.Present_Value

ED15112-8 45

LONWORKS LonWorks Name Profile Uses Heartbeat SNVT Type SNVT Index

nvoUnitStatus.heat_output_primary DAC, SCC Yes SNVT_hvac_status 112

Heating Status Keypad Menu Path Main Menu\View/Set Unit\Unit Status/Settings\Htg Status=

This read-only attribute indicates whether or not heating is currently enabled. If heating is disabled, the reason is indicated. Measurement Units Data Type Valid Range Default Value


Enumerated N/A




<Device Name>.HtgStatus.Present_Value Enumeration

1=Enabled 2=None 3=Off Amb 4=Off Alarm (Not Used) 5=Off Net 6=Off Man


nvoMcQAHUStatus.HtgStatus McQuayDischargeAir, McQuayRTU-SCC


Enumeration

0=Enabled 1=None 2=Off Amb 3=Off Alarm (Not Used) 4=Off Net 5=Off Man

High Pressure Circuit 1 Switch Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the High Pressure Circuit 1 Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a High Pressure Circuit 1 Problem.






<Device Name>.HiPress1Sw.Present_Value Enumeration


46 ED15112-8


























ED15112-8 47



























48 ED15112-8





















HVAC Unit Type Identifier Keypad Menu Path Main Menu\Service Menus\Network Input Status\nciHVACType=

This read-only configuration property indicates the primary application and equipment type for the space comfort controller device. For other SCC object types the application and equipment type can be determined directly from the object type and corresponding device class within the standard program id. The HVAC Unit-Type configuration property can be polled by a tool or an operator interface device, to help the user identify the type of equipment. The HVAC Unit-Type is set at the time of manufacture.


HVAC Unit Type N/A Real Enumerated 0=HVT_GENERIC


ED15112-8 49

LONWORKS LonWorks Name Profile SNVT Type SNVT Index SCPT Reference SCPT Index

nciHvacType SCC SNVT_hvac_type 145 SCPThvacType 169

Enumeration Definitions (SNVT_HVT.H)


0 HVT_GENERIC Generic

1 HVT_FAN_COIL Fan Coil (Not Used)

2 HVT_VAV Variable Air Volume Terminal (Not Used)

3 HVT_HEAT_PUMP Heat Pump (Not Used)

4 HVT_ROOFTOP Rooftop Unit (Not Used)

5 HVT_UNIT_VENT Unit Ventilator (Not Used)

6 HVT_CHILL_CEIL Chilled Ceiling (Not Used)

7 HVT_RADIATOR Radiator (Not Used)

8 HVT_AHU Air Handling Unit (Not Used)

9 HVT_SELF_CONT Self-Contained Unit (Not Used)

0xFF HVT_NUL Invalid value (Not Used)

Local OA Temperature Keypad Menu Path No Keypad Equivalent

This read-only attribute indicates the current outdoor air temperature from the local outdoor air temperature sensor. This variable only applies if the unit is configured for an outdoor air temperature sensor.



Real -50°–150°F -45.56°-65.56°C

N/A




<Device Name>.LocalOATemp.Present_Value


nvoLocalOATemp DAC, McQuayRTU-SCC

Yes SNVT_temp_p 105

Local Space Temperature Keypad Menu Path No Keypad Equivalent

This read-only attribute indicates the current space air temperature from the local space air temperature sensor. This variable only applies if the unit is configured for a space temperature sensor.



Real 0°–150°F -17.78°-65.56°C

N/A




<Device Name>.LocalSpaceTmp.Present_Value

50 ED15112-8


nvoLocalSpaceTmp SCC, McQuayDischargeAir

Yes SNVT_temp_p 105

Low Pressure Circuit 1 Switch Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Low Pressure Circuit 1 Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Low Pressure Circuit 1 Problem.






<Device Name>.LoPress1Sw.Present_Value Enumeration

















ED15112-8 51



























52 ED15112-8

























ED15112-8 53







Maximum Discharge Air Heating Setpoint Keypad Menu Path Main Menu\Commission Unit\Heating Set-Up\Max Htg Spt=

This read/write configuration property defines the maximum discharge air heating setpoint for the controller. It is used to limit the discharge air heating setpoint determined by the discharge air temperature reset function. This point is also changeable via the unit controller keypad/display. The unit controller will use whichever valid value it last received from either the network or the keypad/display. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the unit controller continues to control to the last valid value.



Real 40.0°–140.0 °F 4.4°–60°C

120°F / 48.89°C




<Device Name>.DefaultDATHtgSetpt.Present_Value

LONWORKS LONWORKS Name Profile SNVT Type SNVT Index SCPT Reference SCPT Index

nciDAHtSP DAC SNVT_temp_p 105 SCPTdischargeAirHeatingSetpoint 184

McQuay AHU Unit Status Keypad Menu Path Main Menu\Unit Status= Main Menu\Quick Menu\Unit Status= Main Menu\View/Set Unit\Unit Status/Settings\Unit Status=

This output network variable indicates the operating status of the unit controller.




<Device Name>.McQuayStatus.Present_Value Enumeration

1 = Enabled, 2 = Off Man 3 = Off ManCtrl 4 = Off Net 5 = Off Alarm 6 = Off Fan Retry

54 ED15112-8


nvoMcQAHUStatus.Mode McQuayDischargeAir, McQuayRTU-SCC

Yes UNVTmcQAHUStatus N/A

Measurement UNVTmcQAHUStatus Type Category Structure Type Size 2 bytes Valid Range (Resolution) See Below. The value –1 (NUL) represents invalid value. Uses Receive Heartbeat Yes

Field Definitions

Field Description EconStatus 0 = Enabled

1 = None 2 = Off Ambient 3 = Off Alarm 4 = Off Net 5= Off Man 6= Off Dehum

ClgStatus 0 = Enabled 1 = None 2 = Off Ambient 3 = Off Alarm 4 = Off Net 5= Off Man

HtgStatus 0 = Enabled 1 = None 2 = Off Ambient 3 = Off Alarm 4 = Off Net 5= Off Man

Mode 0 = Enabled, 1 = Off Man 2 = Off Man Ctrl 3 = Off Net 4 = Off Alarm 5 = Off Fan Retry

Minimum Discharge Air Cooling Setpoint Keypad Menu Path Main Menu\Commission Unit\Cooling Set-Up\Min Clg Spt=

This read/write configuration property sets the Minimum Discharge Air Cooling Setpoint. This point is also changeable via the unit controller keypad/display. The unit controller will use the last valid value it received from either the network or keypad/display.



BACnet: Real LonWorks: Signed Lon

39.992-100.0°F 4.44-37.78°C

55°F / 12.78°C




<Device Name>.DefaultDATClgSetpt.Present_Value

ED15112-8 55


nciDAClSP DAC SNVT_temp_p 105 N/A N/A

Minimum Send Time Keypad Menu Path No Keypad Equivalent

This read/write configuration property defines the minimum period of time between automatic network variable output transmissions.


Time Seconds Fixed Point Scalar - unsigned long 0.0–6553.4 sec 0 Seconds



nciMinOutTm DAC, SCC SNVT_time_sec 107 SCPTminSendTime 52

The following network variables are limited by nciMinOutTm if the timer is greater than zero: Send Heartbeat Table

nvoMcQAHUStatus nvoLocalOATemp nvoEffDATempSp nvoUnitStatus nvoEFT_LCT nvoEffectSetpt nvoEffectOccup nvoDuctStatPress nvoExhFanStatus nvoDischAirTemp nvoBldgStatPress nvoConductivity nvoRATemp nvoSpaceRH nvoMATemp nvoSpaceTemp nvoSpaceDewPt nvoCWTemp nvoOutdoorTemp nvoSpaceCO2 nvoOAFlow nvoLocalSpaceTmp

Mixed Air Temperature Keypad Menu Path Main Menu\View/Set Unit\Temperatures\Mixed Air=

This read-only attribute indicates the current mixed air temperature from the mixed air temperature sensor. This variable only applies if the unit is configured as a self-contained unit with a mixed air temperature sensor present.



Real BACnet: -50.0°–249.998°F LONWORKS: -45.56°–121.11°C

N/A




<Device Name>.MATemp.Present_Value


nvoMATemp DAC Yes SNVT_temp_p 105

LONWORKS Name Profile Uses Heartbeat SNVT Type SNVT Index

nvoMixedAirTemp SCC Yes SNVT_temp_p 105

56 ED15112-8

Network Discharge Air Cooling Setpoint Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Dat Clg Spt

This read/write property sets the Network Cooling Discharge Setpoint. This setpoint is set to this value when reset type is set to network. The unit controller internally limits the Present Value that is written between the Min Clg Spt (AV14) and the Max Clg Spt (see the Cooling menu on the unit controller keypad/display).



Real 39.992 – 100.0°F 4.44°–37.78°C

No 55°F / 12.78°C




<Device Name>.DAClgSetpt.Present_Value


nviDAClSP DAC No SNVT_temp_p 105

Network Discharge Air Heating Setpoint Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Dat Htg Spt

This read/write property sets the Network Heating Discharge Setpoint. This setpoint is set to this value when reset is network. The unit controller internally limits the Present Value that is written between the Min Htg Spt and the Max Htg Spt (AV18) (see the Heating menu on the unit controller keypad/display).



Real 39.992–140.0°F 4.44°–60°C

No 100°F / 37.78°C




<Device Name>.DAHtgSetpt.Present_Value


nviDAHtSP DAC No SNVT_temp_p 105

Object Request Keypad Menu Path No Keypad Equivalent This input network variable provides the mechanism to request an operation or a mode for a functional block within a device. A request consists of an object ID (the object_id field) and an object request (the object_request field). The object ID is the functional block index for a functional block on the device. The Node Object functional block is index zero. The remaining functional blocks are numbered sequentially, starting with one. The following functions are supported: RQ_NORMAL - If the specified functional block was in the disabled or overridden state, this request cancels that

state, and returns the functional block to normal operation. If the functional block was already in the normal state, a request to enter the normal state is not an error. After device reset, the state of functional blocks on the device is application-specific. An RQ_NORMAL request that specifies the Node Object functional block index is a request for all functional blocks in the device to leave the disabled and overridden states.

ED15112-8 57

RQ_UPDATE_STATUS - Requests the status of the specified functional block to be sent to the nvoStatus output network variable. The state of the functional block is unchanged. An RQ_ UPDATE_STATUS request that specifies the Node Object functional block is a request for the status of the device and all functional blocks on the device. The status bits of the Node Object (with the exception of invalid_request and invalid_id) are defined to be the inclusive-OR of the status bits of all the other functional blocks in the device; with the possible addition of error conditions and other conditions attributed to the device as a whole, rather than to any individual functional block. For example, if comm_failure is supported for the Node Object, then it should be set when reporting the Node Object functional block status whenever any of the functional blocks in the device reports communications failure, as well as when there is a communications failure at the device level.

RQ_REPORT_MASK - Requests a status mask reporting the status bits that are supported by the specified functional block to be sent to the nvoStatus output network variable. A one bit in the status mask means that the device may set the corresponding bit in the object status when the condition defined for that bit occurs. A zero bit in the status mask means that the bit is never set by the device.


Object Request N/A Structure N/A No N/A

BACnet

No BACnet equivalent

LONWORKS LonWorks Name Profile Uses Heartbeat SNVT Type SNVT Number

nviRequest Node Object No SNVT_obj_status 93

Enumeration Definitions (object_request_t) Value Identifier Notes

0 RQ_NORMAL Enable object and remove override

1 RQ_DISABLED Disable object (not supported)

2 RQ_UPDATE_STATUS Report object status

3 RQ_SELF_TEST Perform object self-test (not supported)

4 RQ_UPDATE_ALARM Update alarm status (not supported)

5 RQ_REPORT_MASK Report status bit mask

6 RQ_OVERRIDE Override object (not supported)

7 RQ_ENABLE Enable object (not supported)

8 RQ_RMV_OVERRIDE Remove object override (not supported)

9 RQ_CLEAR_STATUS Clear object status (not supported)

10 RQ_CLEAR_ALARM Clear object alarm (not supported)

11 RQ_ALARM_NOTIFY_ENABLED Enable alarm notification (not supported)

12 RQ_ALARM_NOTIFY_DISABLED Disable alarm notification (not supported)

13 RQ_MANUAL_CTRL Enable object for manual control (not supported)

14 RQ_REMOTE_CTRL Enable object for remote control (not supported)

15 RQ_PROGRAM Enable programming of special configuration properties (not supported)

16 RQ_CLEAR_RESET Clear reset-complete flag (reset_complete) (not supported)

17 RQ_RESET Execute reset-sequence of object (not supported)

-1(0xFF) OC_NUL Invalid Value

Object Status Keypad Menu Path No Keypad Equivalent This output network variable reports the status for any functional block on a device. It is also used to report the status of the entire device and all functional blocks on the device. A status update consists of an object ID (the object_id field) and multiple status fields. The object ID is the functional block index as described under nviRequest. If the object ID is zero, the status of the device itself and all functional blocks on the device is reported. The status fields are one-bit bitfields. The only supported status fields are the report_mask, invalid_id, and invalid_request fields; all other status fields are not supported. invalid_request - Set to one if an unsupported request code is received on the nviRequest input network variable. invalid_id - Set to one if a request is received for a functional block index that is not defined in the device. No further

checking of the request code is required when set to one.

58 ED15112-8

report_mask Set to one if an RQ_REPORT_MASK request is received by the nviRequest input network variable, and the nvoStatus output network variable is set to contain the status mask. The status mask is an nvoStatus value that describes the status bits that are supported beyond the three mandatory status bits. The status mask consists of all fields in the nvoStatus output network variable, with the exception of the report_mask, invalid_id, and invalid_request fields. A one bit in the mask means that the functional block may set the corresponding bit in the nvoStatus output network variable when the condition defined for that bit occurs. A zero bit means that the functional block may never set the bit.


Object Status N/A Structure N/A N/A

BACnet

No BACnet equivalent


nvoStatus Node Object No SNVT_obj_request 92

Field Definitions


object_id unsigned long 0 to 65,535 2 bytes

invalid_id unsigned 0, 1 1 bit (offset 0)

invalid_request unsigned 0, 1 1 bit (offset 1)

Disabled unsigned 0, 1 1 bit (offset 2) - Not Used

out_of_limits unsigned 0, 1 1 bit (offset 3) - Not Used

open_circuit unsigned 0, 1 1 bit (offset 4) - Not Used

out_of_service unsigned 0, 1 1 bit (offset 5) - Not Used

mechanical_fault unsigned 0, 1 1 bit (offset 6) - Not Used

feedback_failure unsigned 0, 1 1 bit (offset 7) - Not Used

over_range unsigned 0, 1 1 bit (offset 0) - Not Used

under_range unsigned 0, 1 1 bit (offset 1) - Not Used

electrical_fault unsigned 0, 1 1 bit (offset 2) - Not Used

unable_to_measure unsigned 0, 1 1 bit (offset 3) - Not Used

comm_failure unsigned 0, 1 1 bit (offset 4) - Not Used

fail_self_test unsigned 0, 1 1 bit (offset 5) - Not Used

Self_test_in_progress unsigned 0, 1 1 bit (offset 6) - Not Used

locked_out unsigned 0, 1 1 bit (offset 7) - Not Used

manual_control unsigned 0, 1 1 bit (offset 0) - Not Used

in_alarm unsigned 0, 1 1 bit (offset 1) - Not Used

in_override unsigned 0, 1 1 bit (offset 2) - Not Used

report_mask unsigned 0, 1 1 bit (offset 3)

programming_mode unsigned 0, 1 1 bit (offset 4) - Not Used

programming_fail unsigned 0, 1 1 bit (offset 5) - Not Used

Alarm_notify_disabled unsigned 0, 1 1 bit (offset 6) - Not Used

reset_complete unsigned 0, 1 1 bit (offset 7) - Not Used

reserved2 unsigned 0 to 0 8 bits (offset 0) - Not Used

Occupancy Keypad Menu Path Main Menu\View/Set Unit\Occupancy\Occupancy=

This read-only property indicates if the unit is currently in an occupied, unoccupied, or tenant override mode of operation.


Occupancy N/A BACnet: Unsigned LonWorks: Real

Enumerated N/A

ED15112-8 59




<Device Name>.EffectOccup.Present_Value Enumeration

1 = Occ 2 = Unocc 3 = TntOvrd


nvoEffectOccup DAC, SCC Yes SNVT_occupancy 109



0 OC_OCCUPIED Area is occupied

1 OC_UNOCCUPIED Area is unoccupied

2 OC_BYPASS Area is temporarily occupied for the bypass period

3 OC_STANDBY Area is temporarily unoccupied

0xFF OC_NUL Value not available


BACnet Occupancy Lon SNVT_occupancy

1 Occ 0 OC_OCCUPIED

2 Unocc 1 OC_UNOCCUPIED

3 TntOvrd 2 OC_BYPASS

1 Occ 3 OC_STANDBY

3 Auto 0xFF OC_NUL

Occupancy Mode Keypad Menu Path Main Menu\Service Menus\Network Input Status\OccManCmd

This read/write property sets the unit into a different occupancy mode. The request is typically sent by a wall-mounted occupant-interface module or a supervisory node, typically used to manually control occupancy modes or to override the scheduled occupancy. This input is used with nviOccSchedule to determine the effective occupancy mode. Refer to Occupancy (nvoEffectOccup) section for more information.


Mode N/A BACnet: UnsignedLonWorks: Real

Enumerated No Auto or NUL




<Device Name>.OccManCmd.Present_Value Enumeration

1 = Occ 2 = Unocc 3 = TntOvrd 4 = Standby (Same as Occ) 5 = Auto

60 ED15112-8


nviOccManCmd DAC, SCC No SNVT_occupancy 109






3 OC_STANDBY Controller reacts as if the area is occupied.



BACnet nviOccManCmd Lon SNVT_occupancy

1 Occ 0 OC_OCCUPIED

2 Unocc 1 OC_UNOCCUPIED

3 TntOvrd (Bypass) 2 OC_BYPASS

1 Occ 3 OC_STANDBY

4 Auto 0xFF OC_NUL

Occupancy Scheduler Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\NetCurrState= Main Menu\Service Menus\Network Input Status\NetNextState= Main Menu\Service Menus\Network Input Status\NetTmToNxtSt=

This read/write property commands the occupancy function of the MicroTech III Unit Controller when Occupancy Mode is set to Auto (see page 59). A scheduler or a supervisory node typically sends the request. SNVT_tod_event is a structure containing three parts.

Current_state, (required) Next_state (optional) Time_to_next_state (optional)

This network variable is used in conjunction with Optimal Start. If time_to_next_state is not valid, the unit controller uses an internal calculation to determine when the unit will start. Consequently, if time_to_next_state is valid, the unit controller uses this time to determine when the unit will start. This input is used in conjunction with nviOccManCmd (Occupancy Mode) to determine the effective occupancy mode. Refer to Occupancy Mode for more information.


State N/A BACnet: UnsignedLonWorks: Real

Enumerated Yes N/A




<Device Name>.CurrentState.Present_Value Enumeration

1=Occ 2=Unocc 3=TntOvrd (not used) 4=Standby (not used) 5=Auto(NUL)




<Device Name>.NextState.Present_Value

ED15112-8 61

Enumeration

1=Occ 2=Unocc 3=TntOvrd (not used) 4=Standby (not used) 5=Auto(NUL)




<Device Name>.TimeToNextState.Present_Value


nviOccSchedule DAC, SCC Yes SNVT_tod_event 128

Field Definitions

Field Data Point Reference Units Valid Range Notes

current_state Occupancy Scheduler Input occup_t current scheduled occupancy state

next_state Occupancy Scheduler Next occup_t next scheduled occupancy state

time_to_next_state Occupancy Scheduler Time minutes 0 to 65534 65535=Null

Enumeration Definitions (occup_t) Value Identifier Notes




3 OC_STANDBY Area is temporarily unoccupied


Enumeration Correspondence BACnet LONWORKS

1 Occupied 0 OC_OCCUPIED

0 Unoccupied 1 OC_UNOCCUPIED

3 TntOvrd 2 OC_BYPASS

1 Occupied 3 OC_STANDBY

5 NUL 0xFF OC_NUL

Occupied Cooling Setpoint Keypad Menu Path Main Menu\View/Set Unit\Cooling\Zone Clg Spt=

This read/write configuration property sets the Occupied Cooling Setpoint is set to this value when it is not being set by another function. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the controller continues to control to the last valid value. The BACnet property only applies to the subject data point, but the LONWORKS variable is a structure that covers three other data points: Unoccupied Cooling Setpoint (See page 77), Occupied Heating Setpoint (See page 62), and Unoccupied Heating Setpoint (See page 78).


Temperature °F / °C Real 0.0°–100.0 °F / -17.78°–37.78°C 72°F / 22.22°C




<Device Name>.OccCoolSP.Present_Value

62 ED15112-8

LONWORKS LONWORKS Name Profile SCPT Reference SCPT Index SNVT Type SNVT Index

nciSetpoints.Occupied_Cool DAC, SCC SCPTsetPnts 60 SNVT_temp_setpt 106

Field Definitions

Field Notes

Occupied_cool Occupied Cooling Setpoint

Standby_cool Standby Cooling Setpoint (Not Used)

Unoccupied_cool Unoccupied Cooling Setpoint

Occupied_heat Occupied Heating Setpoint

Standby_heat Standby Heating Setpoint (Not Used)

Unoccupied_heat Unoccupied Heating Setpoint

Occupied Heating Setpoint Keypad Menu Path Main Menu\View/Set Unit\Heating\Zone Htg Spt=

This read/write configuration property sets the Occupied Heating Setpoint (See page 38.) The Effective Heating Enable Setpoint is set to this value when it is not being set by any other function. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the controller continues to control to the last valid value. The BACnet property only applies to the subject data point, but the LONWORKS variable is a structure that covers three other data points: Occupied Cooling Setpoint (See page 61), Unoccupied Cooling Setpoint (See page 77), and Unoccupied Heating Setpoint (See page 78).



Real 0.0°–100.0 °F -17.78°–37.78°C

68°F / 20°C




<Device Name>.OccHeatSP.Present_Value


nciSetpoints.occupied_heat DAC, SCC SCPTsetPnts 60 SNVT_temp_setpt 106

Field Definitions

Field Notes







Outdoor Air Damper Minimum Position Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Min OA=

This read/write configuration property sets the Outdoor Air Damper Minimum Position setpoint for MicroTech III Unit Controller. The Minimum Outdoor Air Damper Position Input setpoint uses this value when it is not being set by any other function and when Min OA Type is set to Network. The controller internally limits the Present Value that is written between the DCV Limit and the Vent Limit (see the Min OA Damper menu on the keypad/display). This variable only applies to units configured with an airside economizer.

ED15112-8 63


Position Percent Real 0–100% No N/A




<Device Name>.MinOAPosNetIn.Present_Value


nviOAMinPos DAC, SCC No SNVT_lev_percent 81

Outdoor Air Temperature Keypad Menu Path Main Menu\Quick Menu\OA Temp= Main Menu\View/Set Unit\Temperatures\OA Temp=

This read-only attribute indicates the current value of a unit-mounted outdoor air temperature sensor. This variable only applies if the unit is configured for an outdoor air temperature sensor.



Real -50°–150°F -45.56°-65.56°C

N/A




<Device Name>.OutdoorTemp.Present_Value


nvoOutdoorTemp DAC, SCC Yes SNVT_temp_p 105

Outdoor Air Temperature Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net OAT In=

This read/write property is used to write the outdoor air temperature from the network. If you are using one temperature sensor to determine the outdoor air temperature for the entire network, you can write the temperature to this property. This variable only applies if the unit is configured for an outdoor air temperature sensor, and reverts to the Null value if written out of range.



Real -50°–150°F -45.56°-65.56°C

Yes 327.67 (Null)




<Device Name>.OutdoorTempInput.Present_Value


nviOutdoorTemp DAC, SCC Yes SNVT_temp_p 105

64 ED15112-8

Outdoor Airflow Keypad Menu Path Main Menu\Commission Unit\Min OA Set-Up\OA Flow=

This read-only property indicates the Outdoor Airflow. This variable only applies to units configured for design flow.


Flow Volume ft3/min (CFM) or l/s

BACnet: Real LonWorks: Unsigned Long

0-60007.25 CFM 0-28320 l/s

N/A




<Device Name>.OAFlow.Present_Value


nvoOAFlow DAC, McQuayRTU-SCC

Yes SNVT_flow 15

Outdoor Airflow Setpoint Keypad Menu Path Main Menu\View/Set Unit\Min OA Set-Up\MinOAFlw Spt=

This read-only property indicates the setpoint of Outdoor Airflow. This variable only applies to units configured for design flow.


Flow Volume ft3/min (CFM) or l/s

BACnet: Real

0-60007.25 CFM 0-28320 l/s

2000 CFM/943.9 1/s




<Device Name>.MinOAFlowSpt.Present_Value


Primary Cool Enable Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Cl Ena Sw= Main Menu\Service Menus\Network Input Status\\Net Cl Ena Vl=

This read/write configuration property enables or disables the primary cooling. This variable only applies if the unit is configured for mechanical cooling. In BACnet, if CoolEnable is 0, then the primary cooling is disabled. If it is 1 and CoolEnablePct is 0, the primary cooling is disabled. If CoolEnable is 1 and CoolEnablePct is greater than 0, the primary cooling is enabled. When cooling is enabled, CoolEnablePct reflects the percentage of cooling that is enabled.

The LONWORKS variable nviPriCoolEnable has two properties; a State and a Value. When the State = 0, primary cooling control is disabled through the network. When State = 1, the primary cooling can be controlled through the network. When the Value = 0 and the State = 1, the primary cooling is disabled through the LONWORKS network. When the Value is greater than 0 and the State = 1, the primary cooling is enabled through the LONWORKS network.



LONWORKS: Enumerated Yes N/A

ED15112-8 65




<Device Name>.CoolEnable.Present_Value Enumeration

0 = Off 1 = Enable




<Device Name>.CoolEnablePct.Present_Value


nviPriCoolEnable DAC, McQuayRTU-SCC

Yes SNVT_switch 95

Valid Range

State Value Cooling

0 N/A Disabled

1 0 Disabled

1 1-100 Enabled. Value equals the percentage of cooling that is enabled when State equals 1.


Primary Heat Enable Keypad Menu Path Main Menu\Service Menus\Network Input Status\\Net Ht Ena Sw= Main Menu\Service Menus\Network Input Status\\Net Ht Ena Vl=

This read/write configuration property enables or disables the primary heating. This variable only applies if the unit is configured for heating. In BACnet, if HeatEnable = 0, then the primary heating is disabled. If it HeatEnable = 1 and HeatEnablePct = 0, the primary heating is disabled. If HeatEnable = 1 and HeatEnablePct is greater than 0, the primary heating is enabled. When heating is enabled, HeatEnablePct reflects the percentage of heating that is enabled. The LONWORKS variable nviPriHeatEnable has two properties; a State and a Value. When the State = 0, primary heating control is disabled through the network. When State = 1, the primary heating can be controlled through the network. When the Value = 0 and the State = 1, the primary heating is disabled through the LONWORKS network. When the Value is greater than 0 and the State = 1, the primary heating is enabled through the LONWORKS network.



BACnet: 0-1 LonWorks: Enumerated

Yes N/A




<Device Name>.HeatEnable.Present_Value Enumeration

0 = Off 1 = Enable

66 ED15112-8




<Device Name>.HeatEnablePct.Present_Value


nviPriHeatEnable DAC, McQuayRTU-SCC

Yes SNVT_switch 95

Valid Range

State Value Heating

0 N/A Disabled

1 0 Disabled

1 1-100 Enabled. Value equals the percentage of cooling that is enabled when State equals 1.


Receive Heartbeat Keypad Menu Path Main Menu\BMS Communications\LON Set-Up\Rcv Hrt Bt=

This read/write configuration property defines the maximum time that elapses after the last update to a specified network variable input before the unit starts to use its default values.


Time Seconds BACnet: Real LonWorks: Unsigned Long

0.0–6553.4 sec 0 seconds

The only variables that use Receive Heartbeat are:

LONWORKS Variable

nviOccSchedule

nviApplicCmd

nviSupFanCap

nviOutdoorTemp

nviSpaceTemp

nviPriCoolEnable

nviPriHeatEnable

nviEconEnable

nviExhFanCap

nviRetFanCap

nviCWFlow

nviSpaceIAQ

nviSpaceRH

BACnet* Object Identifier Property



<Device Name>.ReceiveHeartbeat.Present_Value *Note: This point is not supported for BACnet with MicroTech III unit controller application version 2506017300or newer.

LONWORKS There are three categories for deciding to use Receive Heartbeat that are based on the network input variable being specified in the Receive Heartbeat table and being bound. The unit controller uses Category 1 and Category 2.

ED15112-8 67

Network

Variable Input

Specified for Receive Heartbeat in Table?

Bound? Result: Use Receive Heartbeat?

Category 1 Yes Yes Yes

Category 2 Yes No Manufacture Defined

Category 3 Yes Don’t Care No

LONWORKS Name Profile SNVT Type SNVT Index SCPT Reference SCPT Index

nciRcvHrtBt DAC, SCC SNVT_time_sec 107 SCPTmaxRcvTime 48

Reheat Capacity Keypad Menu Path Main Menu\Quick Menu\Reheat Cap= Main Menu\View/Set Unit\Unit Status/Settings\Reheat Cap= Main Menu\View/Set Unit\Dehumidification\Reheat Cap=

This read-only attribute indicates the current percentage of unit reheat capacity. The BACnet property reads only the subject attribute and only applies to the subject data point. The LONWORKS variable is only a part of the LONWORKS Unit Status network variable. See Unit State on page 76 for details of LONWORKS network variable. The LONWORKS variable covers six other data points: Unit State (See page 76), Supply Fan Capacity (See page 74), Cooling Capacity (See page 32), Heating Capacity (See page 43), Economizer Capacity (See page 36), and In Alarm (See page 88).

This variable only applies to units configured with cooling.


Reheat Capacity Percent BACnet: Real LonWorks: Structure

0.0–100.0% N/A




<Device Name>.ReheatCapacity.Present_Value


nvoUnitStatus.heat_output_secondary DAC, SCC Yes SNVT_hvac_status 112

Relative Humidity Keypad Menu Path Main Menu\Quick Menu\Rel Humidity= Main Menu\View/Set Unit\Unit Status/Settings\Rel Humidity= Main Menu\View/Set Unit\Dehumidification\Rel Humidity= Main Menu\Commission Unit\Energy Rec Set-Up\Rel Humidity= This read-only property indicates the current reading of the optional relative humidity sensor.


Relative Humidity Percent Real 0%–100% N/A




<Device Name>.SpaceRH.Present_Value

Enumeration

1=DSP 2=Speed 3=Space

68 ED15112-8


nvoSpaceRH DAC, SCC Yes SNVT_lev_percent 81 Enumeration

0=DSP 1=Speed 2=Space

Relative Humidity Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Rel Humid=

This is a read/write property that the network can use to set the relative humidity from the network. If the network value becomes unreliable, the humidity reverts to the value provided by the attached relative humidity sensor


Relative Humidity Percent Real 0%–100% Yes 163.835 (Null)




<Device Name>.SpaceRHNetIn.Present_Value


nviSpaceRH DAC, SCC Yes SNVT_lev_percent 81

Relative Humidity Setpoint Keypad Menu Path Main Menu\View/Set Unit\Dehumidification\RH Setpoint

This is a read/write property that the network can use to set the relative humidity setpoint from the network. Measurement Units Data Type Valid Range Uses Heartbeat Default Value

Relative Humidity Percent Real 0%–100% No N/A




<Device Name>.HumiditySP.Present_Value


nviSpaceDehumSP DAC, McQuayRTU-SCC

No SNVT_lev_percent 81

Remote Return/Exhaust Fan Capacity Control Flag Keypad Menu Path Main Menu\Commission Unit\RF/EF Set-Up\RF/EF Ctrl=

This read/write property selects the return or exhaust fan airflow control. If the unit is equipped with return fan VFD and this property is set to Tracking, the return fan airflow is controlled based on an adjustable tracking relationship between the supply fan and return fan airflow. If this parameter is set to Building, the return or exhaust fan airflow is controlled independently of the supply fan airflow to maintain the building static pressure at a building static pressure set point. If this parameter is set to Speed, the return or exhaust fan airflow is controlled to a VFD speed set point set via the Return Fan Capacity Input (See page 71.)


Mode N/A BACnet: Unsigned LonWorks: Real

Enumerated No N/A

ED15112-8 69




<Device Name>.ExhRetFanCtrl.Present_Value Enumeration

1 = None 2 = Tracking 3 = BldgP 4 = Speed 5 = OAD


nviExhRetFanCtrl McQuayDischargeAir, McQuayRTU-SCC

No UNVTexhRetFanCtrl N/A

Enumeration

0 = None 1 = Tracking 2 = Bldg Pres 3 = Speed

Remote Supply Fan Capacity Control Flag Keypad Menu Path Main Menu\SAF Set-Up\SAF Ctrl=

This read/write property selects the supply fan airflow control used on a VAV unit. If this parameter is set to Duct Static Pressure (DSP), the supply fan airflow maintains the duct static pressure at the duct static pressure set point. If this parameter is set to Speed, the supply fan airflow is controlled to a VFD speed set via the Supply Fan Capacity Input (See page 75.)


Method N/A BACnet: Unsigned LonWorks: Real

Enumerated No N/A




<Device Name>.SupFanCtrl.Present_Value Enumeration

1 = DSP 2 = Speed


nviSupFanCtrl McQuayDischargeAir No UNVTsupFanCtrl N/A Enumeration

0 = Duct Press 1 = Speed

70 ED15112-8

Return Air Temperature Keypad Menu Path Main Menu\View/Set Unit\Temperatures\Return Air=

This read-only attribute that indicates the current reading from the unit return air temperature sensor. This variable only applies if the unit is configured for a return air sensor.



Real -20°–199.994°F -28.89°–93.33°C

N/A




<Device Name>.RATemp.Present_Value


nvoRATemp DAC, McQuayRTU-SCC

Yes SNVT_temp_p 105

Return/Exhaust Fan Capacity Keypad Menu Path Main Menu\Quick Menu\RF/EF Speed= Main Menu\View/Set Unit\Unit Status/SettingsRF/EF Speed= Main Menu\View/Set Unit\RF\EF Spd Control\RF/EF Speed=

This read-only attribute indicates the current return fan or exhaust fan capacity. This variable only applies to units configured with a return/exhaust fan.


Fan Capacity Percent BACnet: Real LONWORKS: Structure

0-100% N/A




<Device Name>.ExhFanValue.Present_Value


nvoExhFanStatus.value DAC, McQuayRTU-SCC

No SNVT_switch N/A

Field Definitions




ED15112-8 71

Exhaust Fan Status Keypad Menu Path Main Menu\View/Set Unit\Flow Status\Ret/Exh Fan=

This read-only property indicates whether the unit controller is commanding the return or exhaust fan on. This variable only applies to units configured for a return/exhaust fan.


Fan Status N/A BACnet: Enumerated LONWORKS: Structure

Enumerated N/A



Binary Value 5 1 Present_Value 85 Full Reference

<Device Name>.ExhFanState.Present_Value Enumeration

0 = Off 1 = On


nvoExhFanStatus.State DAC, McQuayRTU-SCC

No SNVT_switch N/A

Field Definitions




Return Fan Capacity Input Keypad Menu Path Main Menu\Commission Unit\RF/EF Set-Up\Rem RAF Cap=

This read/write property sets the return/exhaust air VFD speed when Remote Return/Exhaust Fan Capacity Control Flag property is set to Speed. This variable only applies to units that are configured for a modulating return fan. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the unit controller continues to control to the last valid value.


Fan Capacity Percent Real 0–100% Yes N/A




<Device Name>.RetFanCapNetIn.Present_Value


nviRetFanCap DAC, McQuayRTU-SCC Yes SNVT_lev_percent 81

72 ED15112-8

Send Heartbeat Keypad Menu Path Main Menu\BMS Communications\LON Set-Up\SndHrtBt=

This read/write configuration property defines maximum period of time that expires before the specified network variable output is automatically updated.


Time Seconds Fixed Point Scalar - unsigned long 0.0–6553.4 sec 60 seconds


LONWORKS The ability to send a heartbeat is a requirement for LONWORKS devices. Network variable outputs for Send Heartbeat are defined in one of two categories based on whether or not they are specified in the Send Heartbeat table. Network Variable Output Specified for Send Heartbeat in Table? Result: Use Send Heartbeat?

Category 1 Yes Yes

Category 2 No Manufacture Defined

The network input variables that use Send Heartbeat are:

Send Heartbeat Table

nvoMcQAHUStatus nvoLocalOATemp nvoEffDATempSp

nvoUnitStatus nvoEFT_LCT nvoEffectSetpt

nvoEffectOccup nvoDuctStatPress nvoExhFanStatus

nvoDischAirTemp nvoBldgStatPress nvoConductivity

nvoRATemp nvoSpaceRH nvoMATemp

nvoSpaceTemp nvoSpaceDewPt nvoCWTemp

nvoOutdoorTemp nvoSpaceCO2 nvoOAFlow

nvoLocalSpaceTmp

A value of 0 disables the auto update. LONWORKS Name Profile SNVT Type SNVT Index SCPT Reference SCPT Index

nciSndHrtBt DAC, SCC SNVT_time_sec 107 SCPTmaxSendTime 49

Space CO2 Keypad Menu Path Main Menu\Commission Unit\Min OA Set-Up\IAQ PPM= This read-only attribute indicates the current space CO2 level from the optional space CO2 sensor. This value reflects the network input nviSpaceIAQ (if valid) or the value from a locally wired sensor if Min OA Type is set to IAQ VDC or IAQ mA. This variable only applies if the unit is configured for an airside economizer and Min OA Type is set to IAQ VDC or IAQ mA.


Concentration ppm Real 0-5000 ppm

N/A




<Device Name>.SpaceCO2.Present_Value


nvoSpaceCO2 SCC, McQuayDischargeAir

Yes SNVT_ppm 29

ED15112-8 73

Space IAQ Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net Space IAQ=

This read/write attribute indicates the current space CO2 level from the network. This value takes priority over a locally wired sensor. This variable only applies if Min OA Type is set to IAQ VDC or IAQ mA.


Concentration ppm Real 0-5000 ppm Yes 32767 (Null)




<Device Name>.SpaceIAQNetIn.Present_Value


nviSpaceIAQ SCC, McQuayDischargeAir

Yes SNVT_ppm 29

Space Temperature Keypad Menu Path Main Menu\View/Set Unit\Temperatures\Space Temp=

This read-only attribute indicates the current space or zone temperature from the optional space air temperature sensor. This variable only applies if the unit is configured for a space temperature sensor.

Note: If the optional space temperature sensor is not installed and a BACnet or LONWORKS network is not writing to the space temperature, the Space Sensor attribute in the Unit Configuration menu of the keypad/display should be set to No to disable the alarm function associated with an open circuit at the space temperature sensor input.



Real 0°–150°F -17.78°-65.56°C

N/A




<Device Name>.SpaceTemp.Present_Value


nvoSpaceTemp DAC, SCC Yes SNVT_temp_p 105

Space Temperature Input Keypad Menu Path Main Menu\Service Menus\Network Input Status Net SpaceT In=

This read/write attribute indicates the current space or zone temperature that is written from the network. If this network value becomes unreliable, the temperature reverts to the value provided by the attached Space Temperature sensor. This variable only applies if the unit is configured for a space temperature sensor.



Real 0°–150°F -17.78°-65.56°C

Yes 327.67 (Null)

74 ED15112-8




<Device Name>.SpaceTempInput.Present_Value


nviSpaceTemp DAC, SCC Yes SNVT_temp_p 105

Sump Pump Water Level Switch Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Sump Pump Water Level Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Sump Water Level Problem.






<Device Name>.SmpWtrLvlSw.Present_Value Enumeration



Supply Fan Capacity Keypad Menu Path Main Menu\SAF Speed= Main Menu\View/Set Unit\Unit Status/Settings\SAF Speed= Main Menu\View/Set Unit\SAF Spd Control\SAF Speed=

This read-only attribute indicates the current supply fan capacity. The BACnet property reads only the subject attribute; however the LONWORKS variable is only a part of the LONWORKS Unit Status network variable. See Unit State on page 76 for details of LONWORKS network variable. This variable will read 0% whenever the fan is off. If the unit is configured as constant volume, this variable reads 100% when the fan is on. Otherwise it will read the feedback from the VFD.

The BACnet property only applies to the subject data point. The LONWORKS variable covers six other data points: Unit State (See page 76), Cooling Capacity (See page 32), Heating Capacity (See page 43), Reheat Capacity (See page 67, Economizer Capacity (See page 36), and In Alarm (See page 88).


Supply Fan Capacity Percent BACnet: Real LONWORKS: Structure

0-110%

N/A




<Device Name>.FanSpd.Present_Value

ED15112-8 75


nvoUnitStatus.fan_output DAC, SCC Yes SNVT_hvac_status 112

Supply Fan Capacity Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\Rem SAF Cap=

This read/write property sets the discharge air VFD speed when the Supply Fan Capacity Control Flag is set to Speed.

This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the unit controller continues to control to the last valid value.


Fan Capacity Percent Real 0–100 % Yes N/A




<Device Name>.SupFanCapNetIn.Present_Value


nviSupFanCap DAC Yes SNVT_lev_percent 81

Temperature Setpoint Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\nviSetpoint=

This read/write property is only used in LONWORKS networks. It determines the Effective Setpoint Output (See page 38.) If the value is valid, the Effective Setpoint Output is determined by this value (See page 38.) If the value is not valid, the Effective Setpoint Output does not depend on this value (See page 38.) If a value greater than 37.7°C (100.0°F) is written, this value will be considered invalid and the value from the network is ignored. The unoccupied setpoints are not changed.

Note: On space comfort control units the Space Setpoint Type must not be set to Tstat, otherwise the space setpoint adjustment on the optional space sensor overrides the Temperature Setpoint Input (nviSetpoint).


Temperature °F / °C Fixed Point Scalar - signed long -17.78°–37.7°C No N/A



nviSetpoint SCC, McQuayDischargeAir

No SNVT_temp_p 105

Time Keypad Menu Path Main Menu\View/Set Unit\Date/Time/Schedules\Time=

This read/write property sets the current time of the form hours, minutes, seconds, and hundredths of a second. See ANSI/ASHRAE 135-2004 for a definition of the data type.


Time hours, minutes, seconds, and hundredths of a second

BACnet time data types N/A N/A

76 ED15112-8



Device 8 Variable Local Time 57 Full Reference

<Device Name>.Local Time

Unit State Keypad Menu Path Main Menu\Unit State= Main Menu\Quick Menu\Unit State= Main Menu\View/Set Unit\Unit Status/Settings\Unit State=

This read-only property indicates the current unit operating state. This is a LONWORKS only variable that covers six other data points: Supply Fan Capacity (See page 74), Cooling Capacity (See page 32), Heating Capacity (See page 43), Reheat Capacity (See page 67), Economizer Capacity (See page 36), and In Alarm (See page 88).


Unit State N/A BACnet: Unsigned LONWORKS: Structure

Enumerated N/A




<Device Name>.UnitState.Present_Value Enumeration

1 = Off

2 = Start 3 = Recirc 4 = FanOnly 5 = MinDAT 6 = Htg 7 = Econo 8 = Clg

LONWORKS LONWORKS Name Profile Uses Heartbeat SNVT Type SNVT Number

nvoUnitStatus.Mode DAC, SCC Yes SNVT_hvac_status 112

Enumeration Definitions (hvac_t) Value Identifier Notes

0 HVAC_AUTO Not Used

1 HVAC_HEAT

2 HVAC_MRNG_WRMUP Not Used

3 HVAC_COOL

4 HVAC_NIGHT_PURGE Not Used

5 HVAC_PRE_COOL Not Used

6 HVAC_OFF Unit State is either Off or Startup.

7 HVAC_TEST Not Used

8 HVAC_EMERG_HEAT Not Used

9 HVAC_FAN_ONLY Unit State is Recirc, FanOnly or MinDAT

10 HVAC_FREE_COOL Unit State is Econo

11 HVAC_ICE Not Used

12 HVAC_MAX_HEAT Not Used

13 HVAC_ECONOMY Not Used

ED15112-8 77

14 HVAC_DEHUMID Not Used

15 HVAC_CALIBRATE Not Used

16 HVAC_EMERG_COOL Not Used

17 HVAC_EMERG_STEAM Not Used


Unit Support Keypad Menu Path Main Menu\BMS Communications\BACnet IP Set-Up\Unit Support= Main Menu\BMS Communications\BACnet MSTP Set-Up\Unit Support=

This is a BACnet-only variable that sets the units that are sent from the main controller to the BACnet network. If the value is Off, the units is always Metric. If the value is On, the units depend on how the keypad/display is setup. If the keypad is displaying Metric, BACnet will display Metric. If the keypad is setup to display English Units, BACnet will display English units. The power must be cycled on the unit controller for this change to take effect.


Unit Support N/A BACnet: Unsigned LONWORKS: Structure

Off (Always Metric) On

On (2)




<Device Name>.UnitSupport.Present_Value Enumeration

1 = Off 2 = On

Unoccupied Cooling Setpoint Keypad Menu Path Main Menu\View/Set Unit\Cooling\Unocc Clg Spt=

This read/write configuration property sets the temperature above which the unit starts and provides cooling (night setup) during unoccupied periods. An optional space temperature sensor is required for unoccupied cooling operation. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the controller continues to control to the last valid value. The BACnet property only applies to the subject data point, but the LONWORKS variable is a structure that covers three other data points: Occupied Cooling Setpoint (See page 61), Occupied Heating Setpoint (See page 62), and Unoccupied Heating Setpoint (See page 78).



Real 39.992°–99.986 °F -4.44°–37.77°C

85°F / 29.44°C




<Device Name>.UnoccCoolSetpt.Present_Value


nciSetpoints.unoccupied_cool DAC, SCC SCPTsetPnts 60 SNVT_temp_setpt 106

78 ED15112-8

Field Definitions

Field Notes







Unoccupied Heating Setpoint Keypad Menu Path Main Menu\View/Set Unit\Heating\Unocc Htg Spt=

This read/write configuration property sets the temperature above which the unit starts up and provides unoccupied heating (night setback). An optional space temperature sensor is required for unoccupied heating. This attribute uses maximum and minimum limits. If the Present Value is set beyond these limits from the network, the value is ignored and the controller continues to control to the last valid value. The BACnet property only applies to the subject data point, but the LONWORKS variable is a structure that covers three other data points: Occupied Cooling Setpoint (See page 61), Unoccupied Cooling Setpoint (See page 77), and Occupied Heating Setpoint (See page 62).



Real 39.992°–99.986 °F -4.44°–37.77°C

55°F / 12.78°C




<Device Name>.UnoccHeatSetpt.Present_Value


nciSetpoints.unoccupied_heat DAC, SCC SCPTsetPnts 60 SNVT_ temp_setpt 106

Field Definitions

Field Notes







VAV Box Output Keypad Menu Path No Keypad Equivalent

This read-only property indicates the state of the VAV Box Output. This output is provided for interlocking field VAV box operation with the unit heating or cooling. The value is 0 when the unit is in any heating state and 1 in any other state. This variable applies only to units configured with supply fan VFDs.


N/A N/A BACnet: Unsigned LONWORKS: Enumerated

BACnet: 1-2 LONWORKS: 0-1

N/A

ED15112-8 79




<Device Name>.VAVBoxOutput.Present_Value Enumeration

1 = Heat (Off) 2 = Cool (On)


nvoVAVBoxOut McQuayDischargeAir No UNVTvavBoxOutput N/A Enumeration

0 = Heat (Off) 1 = Cool (On)

Water Flow Switch Keypad Menu Path Main Menu\View/Set Unit\Flow Status\Waterflow=

This read-only BACnet object indicates the condition of the Water Flow Switch (Closed (1) or Open (0)). The OffNormal state of this object indicates a Water Flow Switch Problem.






<Device Name>.WtrFlwSw.Present_Value Enumeration



Water Regulating Valve Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates the condition of the Water Regulating Valve (alarm (1) or normal (0)). The OffNormal state of this object indicates a Water Regulating Valve Problem.






<Device Name>.WtrRegVlv.Present_Value Enumeration

0 – normal 1 – alarm

80 ED15112-8


Waterflow Switch Input Keypad Menu Path Main Menu\Service Menus\Network Input Status\Net CFlw Val=

This read/write property sets the waterflow status via the network. BACnet uses a single variable while LONWORKS uses a SNVT_switch variable containing two properties that are used to determine the status. This variable applies only to units that are configured for mechanical cooling, the cooling configuration is either individual circuits or dual circuit water condenser, and no head pressure control.


Flow Status N/A BACnet: Real LONWORKS: Structure

Enumerated Yes N/A




<Device Name>.WaterflowSwitch.Present_Value


nviCWFlow DAC, McQuayRTU-SCC

Yes SNVT_switch 95

Valid Range

State Value Waterflow Switch

0 N/A Disabled

1 0 Disabled

1 1-100% Enabled

-1 (0xFF) N/A Auto (invalid)

ED15112-8 81

Alarms

Two methods of obtaining alarm information are available in the MicroTech III Unit Controller: 1) by monitoring individual alarms and 2) by monitoring alarms according to alarm class. Alarms are divided into three classes: Faults, Problems, and Warnings. Fault alarms have the highest priority. Problem alarms have the next priority. Warning alarms have the lowest priority. The alarms within each class are also prioritized. Refer to the MicroTech III Unit Controller Operation Manual (OM 920) for a description of each alarm. The MicroTech III Unit Controller has various ways of managing alarms, depending on the protocol. Using one of these mechanisms, alarms can be recognized and acknowledged by alarm class or individually, and cleared from the network by alarm class. Refer to Tables 4, 5, and 6 for details.

The following tables describe the alarm messages, indication, and method of clearing Fault, Problem, and Warning alarms. Alarms are listed in order of priority.

Fault Alarms (Highest Priority) Table 4. Fault Alarms in Order of Priority

Alarm Message Indication Clear

Heat Fail RPS with gas heating on FSG off on safety lockout Automatic

Freeze Supply Fan has been On for at least 30 seconds AND A Waterside Economizer, Chilled Water Coil, Hot Water Coil, or steam coil is installed in the unit. AND Freezestat is in the Open position.

Manual

Emergency Stop Emergency Stop Input in the Alarm (Open) condition OR A network variable, nviEmergMode in LonMark applications, is set to shutdown via a Lon or BACnet network

Manual

Control Temp All of the following are true for at longer than the Temperature Alarm Delay (Default = 30 seconds): Either Space or Return Temperature is selected as the Control Temperature AND The Return Air Sensor is not Reliable (Either In alarm or Not Present) AND The Space Sensor is not Reliable (A valid Space Temperature value is not provided via the

network and the Space Temperature sensor is either In alarm OR Not Present) OR

Both of the following are true for at longer than the Temperature Alarm Delay (Default = 30 seconds): The Outdoor Air Temperature Sensor is not Reliable (A valid Outside Air Temperature

value is not provided via the network and the Outside Air Temperature sensor is either In alarm OR Not Present) AND

OAT is selected as the Control Temperature OR

All of the following are true for at longer than the Temperature Alarm Delay (Default = 30 seconds): The MAT Sensor is not Reliable (Either In alarm or Not Present) AND MAT is selected as the Control Temperature

Manual

Disch Sensor The Discharge Air Temperature Sensor is not Reliable (Either In alarm or Not Present) for longer than the Temperature Alarm Delay (Default = 30 seconds)

Manual

Duct Hi Limit Duct High Limit input is Open and the unit is Variable Air Volume Manual

High Return Temp RAT exceeded the Hi Return Tmp setting Manual

High Disch Temp DAT exceeded the Hi Disch Tmp setting Manual

Low Disch Temp DAT fell below the Lo Disch Tmp setting Manual

Airflow All of the following are true: The Supply Fan is Constant Volume AND Airflow Switch is Open. AND The Supply Fan has been on for longer than the Airflow Timer (Default =120 seconds) AND Another Shutdown Fault that could have turned off the fan is not active

OR Both of the following are true: The Supply Fan is Variable Air Volume AND The unit has been disabled due to Fan Retry conditions three times between 2:00 AM of one day

and 2:00 AM of the next day.

Manual

82 ED15112-8

Problem Alarms (Medium Priority)

Table 5. Problem Alarms in Order of Priority


Freeze Freezestat tripped while SAF was off and a waterside economizer, chilled water coil, hot water coil, or steam coil is installed on the unit.

Automatic

MAT Sensor The Mixed Air Temperature sensor is not Reliable (Either In alarm or Not Present) for longer than the Temperature Alarm Delay (Default = 30 seconds)

Automatic

EWT Sensor The Entering Water Temperature Sensor is not Reliable (Either In alarm or Not Present) for longer than the Temperature Alarm Delay (Default = 30 seconds)

Automatic

OAT Sensor The Outdoor Air Temperature Sensor is not Reliable (A valid Outside Air Temperature value is not provided via the network and the Outside Air Temperature sensor is either In alarm OR Not Present) for longer than the Temperature Alarm Delay (Default = 30 seconds)

Automatic

Space Sensor The Space Sensor is not Reliable (A valid Space Temperature value is not provided via the network and the Space Temperature sensor is either In alarm OR Not Present) for longer than the Temperature Alarm Delay (Default = 30 seconds)

Automatic

Return Sensor The Return Air Sensor is not Reliable (Either In alarm or Not Present) for longer than the Temperature Alarm Delay (Default = 30 seconds)

Automatic

Ent_LCT Sensor The Entering Fan Temperature/Leaving Coil Temperature is not reliable (either in alarm or not present) for longer than the temperature alarm delay (defaul=30seconds)

Automatic

Sump Pump Fail Cooling has been limited to stage zero due to sump pump fail conditions three times between 2:00AM of one day and 2:00AM of the next day.

Manual

Hi Pres-Ckt1 High Pressure switch SW1 input is in the alarm (Open) position. Manual






Lo Pres-Ckt1 The Low Press SW1 input has been in the alarm (Open) position for longer than the Pressure Alarm Delay (Default = 10 seconds) AND A compressor on Circuit #1 has been on for longer than the Low Pressure Alarm Delay (Default = 65 seconds)

Automatic


Automatic


Automatic


Automatic


Automatic


Automatic

Water RegValve Water Regulating Valve is installed AND A compressor on either circuit # 1 or circuit # 2 is turned on. AND EWT is less than 58F AND The greater of the two refrigerant condensing pressure readings is below the Head Pressure Setpoint by more than the deadband

Manual

Waterflow Switch Lack of water flow is indicated by an open water flow switch or a Network signal AND Either of the following is true: The Bypass Valve has been open for more than the Bypass Valve Timer. A water side economizer is installed and its position is greater than 50%

Automatic

Heat Fail Problem McQuay gas heat flame safeguard (FSG) device is off on safety lockout. Automatic

ED15112-8 83

Warning Alarms (Lowest Priority) Table 6. Warning Alarms in Order of Priority


Conductivity Conductivity valve is above alarm setpoint value. Manual

Airflow Switch Airflow switch is in the Flow (Closed) position AND the supply fan is Off for more than 30 minutes.

Manual

Dirty Filter The filter switch input is in the alarm (Open) position Manual

Alarm Monitoring The MicroTech III Unit Controller provides individual alarm identification through a unique value for each alarm. The value assigned to each alarm is the same for both BACnet and LONWORKS applications.

BACnet MicroTech III Unit Controllers may have alarms monitored by one of four methods: 1) individually by BACnet Binary Value Objects, 2) alarm value using one BACnet Analog Values, 3) alarm class or 4) Notification Classes.

1. To monitor alarms individually, read the Present_Value of the desired Binary Value. Each alarm has its own Binary Value object. If the Present_Value is Inactive (0), the alarm is not active. If the Present_Value is Active (1), the alarm is active.

2. To monitor alarms by alarm value, read the Present_Value property of the Alarm Value Analog Value object. The Present_Value displays a value that corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed. For example, if there is a simultaneous Dirty Filter Warning (value of 24) and a Freeze Fault (value of 252), then the Freeze Fault value of 252 will display in the Present_Value because it is the higher priority alarm of the two. Once the Freeze Fault condition is corrected and the fault is cleared, the next priority active alarm value (in this example, value of 24 for Dirty Filter alarm) is displayed. The values for all alarms are described in the Alarms section tables. If the Present_Value displays a zero, there are no active alarms.

3. To monitor alarms by alarm class, read the Present_Value of the appropriate Analog Value object (Warnings, Problems and faults). The Present_Value displays a value that corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed.

4. To monitor alarms using the Notification Class objects, see the Alarm Notification section.

LONWORKS MicroTech III Unit Controllers may have their alarms monitored by one of two methods: 1) using the In_alarm attribute of nvoUnitStatus, or 2) alarm class.

1. Alarms can be monitored individually by using the In Alarm attribute of the Unit Status Network Variable Output (i.e. nvoUnitStatus_in_alarm). This attribute displays a value that corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed in this attribute. For example, if there is a simultaneous Dirty Filter Warning (value of 24) and a Freeze Fault (value of 252), then the Freeze Fault value of 252 will display in nvoUnitStatus_in_alarm because it is the higher priority alarm of the two. Once the Freeze Fault condition is corrected and the fault is cleared, the next priority active alarm value (in this example, value of 24 for Dirty Filter alarm) is displayed. The values for all alarms are described in the Alarms section tables. If the attribute nvoUnitStatus_in_alarm displays a zero, there are no active alarms.

Alarms may also be monitored by alarm class if desired. When the nvoUnitStatus_in_alarm attribute reads a value in the range of 1 to 99, a Warning Alarm is active. When the attribute reads a value in the range of 100 to 199, a Problem Alarm is active. When the attribute reads a value in the range of 200 to 255, a Fault Alarm is active.

2. To monitor alarms by alarm class, read nvoWarnAlarm, nvoProbAlarm and nvoFaultAlarm. The value corresponds to the highest priority alarm that is active. It is possible to have multiple active alarms, but only the highest priority is displayed.

84 ED15112-8

Alarm Notification The MicroTech III Unit Controller has three Notification Class objects for alarms and uses intrinsic reporting which allows the controller to generate event notifications directed to one or more recipients (maximum 20 recipients). There is one notification class object for each class of alarms (faults, problems and warnings). You must subscribe to the notification class objects in order to use them. The Recipient List property must indicate when and to which device notification should be made. This is a standard BACnet data type as defined in ANSI/ASHRAE 135-2004, BACnet A Data Communication Protocol for Building Automation and Control Networks. The Event_Enable property of each object can be used to separeatly enable and disable reporting of To-OffNormal, To-Fault, and To-Normal events. For example, if you do not want an event to be generated when the object returns to a normal state after being in alarm, set the To-Normal bit of the objects Event_Enable property to 0. The tables below show the objects that support intrisic reporting grouped with the notification classes they report to:

Notification Class 1 (Faults)

Event_Enable (Default) Alarm Object Type Object Instance

To-OffNormal To-Fault To-Normal

Airflow Fault BI 1 X X

Control Temp Fault AI 14 X X

Discharge Sensor Fault

High Discharge Temp Fault

Low Discharge Temp Fault

AI 1 X X X

Duct High Limit Fault BI 21 X X

Emergency Off Fault BI 22 X X

Freeze Fault BI 19 X X

High Return Temp Fault AV 45 X X X

Notification Class 2 (Problems)



Entering Fan Temp / Leaving Coil Temp Problem

AI 7 X X

Entering Water Temp Problem AI 6 X X

Freeze Problem BI 20 X X

Heat Fail Problem BI 23 X X

High Pressure Circuit 1 Problem BI 4 X X






Return Temp Problem AI 2 X X X

Low Pressure Circuit 1 Problem BI 10 X X






Mixed Air Temp Problem AI 5 X X

Outdoor Temp Problem AI 4 X X

Space Temp Problem AI 3 X X

Sump Pump Fail Problem BI 16 X X

Waterflow Switch Problem BI 17 X X

Water Regulating Valve Problem BI 18 X X

Notification Class 3 (Warnings)



Airflow Switch Warning BI 2 X X

Conductivity Warning AI 12 X X

Dirty Filter Warning BI 3 X X

ED15112-8 85

Recipient List Property The recipient list property (Recipient_List), of the Notification Class object, is a list of standard BACnet data type BACnetDestination elements. This data type consists of the following elements: Element Standard BACnet Data Type Description

Valid Days BACnetDaysOfWeek The set of days of the week that the destination may be used between the From Time and the To Time

From Time, To Time Time The window of time (inclusive) when the destination is visible on the days of the week in Valid Days

Recipient BACnet Recipient The destination devices to receive the notification. A maximum of 20 destination devices is supported.

Process Identifier Unsigned The handle of a process within the recipient device that is to receive the event notification

Issue Confirmed Notification Boolean (TRUE) if confirmed notifications are to be sent and (FALSE) if unconfirmed notifications are to be sent

Transitions BACnetEventTransitionBits A set of three flags that indicate the transition (TO-OFFNORMAL, TO-FAULT, and TO-NORMAL that the recipient is suitable.

If the BACnet workstation or BACnet device supports intrinsic alarming, but is unable to subscribe to the recipient list property of the notification class object, the workstation or device can still receive alarm notification by adding its Device Instance to the “NC Dev 1=” or “NC Dev 2=” items on the keypad/display. These items are located on the IP Setup or MSTP Setup menus. Power must by cycled for changes to these items to take effect. Once power is cycled, the unit controller sends out a “Who-Is” command directed at the device. If the device reponds, the unit controller sends out Unconfirmed Notifications for all alarms that are generated in the application. If the device does not respond to the Who-Is, the unit controller will periodically send out the Who-Is until the device responds.

Alarm Clearing BACnet Alarms can be cleared via BACnet by setting the ClearAlms variable to value greater than 1. To clear alarms by alarm class, change the Present_Value property to a 2 to clear all faults, a 3 to clear all problems or a 4 to clear all warnings. Setting this variable to a 5 will clear all alarms in all three alarm classes. After the alarms are cleared, this variable will return to None (1).

LONWORKS Alarms can be cleared by alarm class using nviClearAlarms. To clear alarms in a particular class, set the value of nviClearAlarms to the appropriate value (1=Clear Faults, 2=Clear Problems, 3=Clear Warnings & 4=Clear All). If the unit is still in the alarm condition, the In Alarm attribute of the Unit Status Network Variable Output (nvoUnitStatus.in_alarm) again reads the number corresponding to the highest priority active alarm that still exists.

Objects Clear Alarms Keypad Menu Path Main Menu\Alarm Lists\Active Alarms\ClrAlms=

This read/write property clears all active alarms or all active alarms in a particular alarm class.


Alarms N/A BACnet: Unsigned LONWORKS: Structure

Enumerated No N/A




<Device Name>.ClearAlarms.Present_Value

86 ED15112-8

Enumeration

1 = None 2 = ClrFlts 3 = ClrPrblms 4 = ClrWrngs 5 = ClrAllAlms


nviClearAlarms McQuayDischargeAir, McQuayRTU-SCC

No UNVTclearAlarm N/A

Enumeration

0 = None 1 = Clear All Faults 2 = Clear All Problems 3 = Clear All Warnings 4 = Clear All Alarms

Notification Class - Faults Keypad Menu Path No Keypad Equivalent

These read/write properties allows subsciption to alarm notifications. The Recipient_List conveys a list of one or more recipients to which notifications will be sent. The Ack_Required property tells wether acknoledgment is requird in notifications generated for To-OffNormal, To-Fault, and To-Normal event transistions. The Priority conveys the priority to be used for event notifications to To-OffNormal, To-Fault and To-Normal events. See the Alarm Notification section (see page 84) for more information including a list of objects that report events to this notification class.


Notification N/A List of BACnetDestination N/A N/A



Notification Class 15 1 recipient_list 102 Full Reference

<Device Name>.NC1-Faults.recipient_list1, 2 1 If the BACnet Workstation is unable to subscribe to the recipient_list, you can still subscribe to alarms on the unit controller keypad/display. Navigate to the IP Setup or MSTP

Setup menu and enter the Device Instance of the device to receive the alarms in the “NC Dev 1=” or “NC Dev 2=” entries. You must cycle power after changing these properties from the keypad/display.

2 Maximum of 20 recipients at one time.



Notification Class 15 1 Ack_Required 1 Full Reference

<Device Name>.NC1-Faults.Ack_Required



Notification Class 15 1 Priority 86 Full Reference

<Device Name>.NC1-Faults.Priority1 1 A lower number indicates a higher priority.

LONWORKS No LonWorks equivalent.

ED15112-8 87

Notification Class - Problem Keypad Menu Path No Keypad Equivalent







<Device Name>.NC1-Problems.recipient_list1, 2 1 If the BACnet Workstation is unable to subscribe to the recipient_list, you can still subscribe to alarms on the unit controller keypad/display. Navigate to

the IP Setup or MSTP Setup menu and enter the Device Instance of the device to receive the alarms in the “NC Dev 1=” or “NC Dev 2=” entries. You must cycle power after changing these properties from the keypad/display.





<Device Name>.NC1-Problems.Ack_Required




<Device Name>.NC1-Problems.Priority1 1 A lower number indicates a higher priority.


88 ED15112-8

Notification Class - Warnings Keypad Menu Path No Keypad Equivalent







<Device Name>.NC1-Warnings.recipient_list1, 2 1 If the BACnet Workstation is unable to subscribe to the recipient_list, you can still subscribe to alarms on the unit controller keypad/display. Navigate to

the IP Setup or MSTP Setup menu and enter the Device Instance of the device to receive the alarms in the “NC Dev 1=” or “NC Dev 2=” entries. You must cycle power after changing these properties from the keypad display.





<Device Name>.NC1-Warnings.Ack_Required




<Device Name>.NC1-Warnings.Priority1 1 A lower number indicates a higher priority.


Alarm Value Keypad Menu Path No Keypad Equivalent This object allows individual notification of the highest priority active alarm. The value in the table below is the largest number in its enumeration that corresponds to an active alarm. This object is set to zero if no alarms are active.


Alarms N/A BACnet: Real LONWORKS: Structure

Enumerated N/A




<Device Name>.AlarmValue.Present_Value

ED15112-8 89

Property Value

0 – No Active Alarms 24 - Dirty Filter 28 – Airflow Sw 32 – Conductivity 137 – Waterflow Sw 140 – Water Regulating Valve 154 – Low Pressure – Circuit 6 155 – Low Pressure – Circuit 5 156 – Low Pressure – Circuit 4 157 – Low Pressure – Circuit 3 158 – Low Pressure – Circuit 2 159 – Low Pressure – Circuit 1 162 – High Pressure – Circuit 6 163 – High Pressure – Circuit 5 164 – High Pressure – Circuit 4 165 – High Pressure – Circuit 3 166 – High Pressure – Circuit 2 167 – High Pressure – Circuit 1 169 – Sump Pump Fail 179 – EFT_LCT Problem 182– Return Air Sensor Problem 185 – Space Sensor Problem 188 – OAT Sensor Problem 191 – EWT Problem 194 – MAT Problem 197 – Freeze Problem 199 – Heat Fail Problem 208 – Airflow Fault 212 – Low Discharge Air Temp 216 – High Discharge Air Temp 220 – High Return Air Temp 224 – Duct High Limit 228 – Discharge Sensor Fail 244 – Control Temp Fault 250 – Emergency Stop Fault 252 – Freeze Fault


nvoUnitStatus.in_alarm DAC, SCC Yes SNVT_hvac_status 112

90 ED15112-8

Property Value

0 – No Active Warnings 24 - Dirty Filter 28 – Airflow Sw 32 – Conductivity 137 – Waterflow Sw 140 – Water Regulating Valve 154 – Low Pressure – Circuit 6 155 – Low Pressure – Circuit 5 156 – Low Pressure – Circuit 4 157 – Low Pressure – Circuit 3 158 – Low Pressure – Circuit 2 159 – Low Pressure – Circuit 1 162 – High Pressure – Circuit 6 163 – High Pressure – Circuit 5 164 – High Pressure – Circuit 4 165 – High Pressure – Circuit 3 166 – High Pressure – Circuit 2 167 – High Pressure – Circuit 1 169 – Sump Pump Fail 179 – EFT_LCT Problem 182– Return Air Sensor Problem 185 – Space Sensor Problem 188 – OAT Sensor Problem 191 – EWT Problem 194 – MAT Problem 197 – Freeze Problem 199 – Heat Fail Problem 208 – Airflow Fault 212 – Low Discharge Air Temp 216 – High Discharge Air Temp 220 – High Return Air Temp 224 – Duct High Limit 228 – Discharge Sensor Fail 244 – Control Temp Fault 250 – Emergency Stop Fault 252 – Freeze Fault

Warning Alarm Keypad Menu Path No Keypad Equivalent This object allows individual notification of the highest priority active warning alarm. The value in the table below is the largest number in its enumeration that corresponds to an active alarm. This object is set to zero if no warning alarms are active.



Enumerated N/A




<Device Name>.ActiveWarning.Present_Value

ED15112-8 91

Enumeration

0 – No Active Alarms 24 - Dirty Filter 28 – Airflow Sw 32 – Conductivity


nvoWarnAlarm DAC, SCC Yes SNVT_hvac_status 112 Property Value

0 – No Active Warnings 24 - Dirty Filter 28 – Airflow Sw 32 – Conductivity

Problem Alarm Keypad Menu Path No Keypad Equivalent This object allows individual notification of the highest priority active problem alarm. The value in the table below is the largest number in its enumeration that corresponds to an active alarm. This object is set to zero if no problem alarms are active.



Enumerated N/A




<Device Name>.ActiveProblem.Present_Value Enumeration

0 – No Active Alarms 137 – Waterflow Sw 140 – Water Regulating Valve 154 – Low Pressure – Circuit 6 155 – Low Pressure – Circuit 5 156 – Low Pressure – Circuit 4 157 – Low Pressure – Circuit 3 158 – Low Pressure – Circuit 2 159 – Low Pressure – Circuit 1 162 – High Pressure – Circuit 6 163 – High Pressure – Circuit 5 164 – High Pressure – Circuit 4 165 – High Pressure – Circuit 3 166 – High Pressure – Circuit 2 167 – High Pressure – Circuit 1 169 – Sump Pump Fail 179 – EFT_LCT Problem 182– Return Air Sensor Problem 185 – Space Sensor Problem 188 – OAT Sensor Problem 191 – EWT Problem 194 – MAT Problem 197 – Freeze Problem 199 – Heat Fail Problem

92 ED15112-8


nvoProbAlarm DAC, SCC Yes SNVT_hvac_status 112 Property Value

0 – No Active Warnings 137 – Waterflow Sw 140 – Water Regulating Valve 154 – Low Pressure – Circuit 6 155 – Low Pressure – Circuit 5 156 – Low Pressure – Circuit 4 157 – Low Pressure – Circuit 3 158 – Low Pressure – Circuit 2 159 – Low Pressure – Circuit 1 162 – High Pressure – Circuit 6 163 – High Pressure – Circuit 5 164 – High Pressure – Circuit 4 165 – High Pressure – Circuit 3 166 – High Pressure – Circuit 2 167 – High Pressure – Circuit 1 169 – Sump Pump Fail 179 – EFT_LCT Problem 182– Return Air Sensor Problem 185 – Space Sensor Problem 188 – OAT Sensor Problem 191 – EWT Problem 194 – MAT Problem 197 – Freeze Problem 199 – Heat Fail Problem

Fault Alarm Keypad Menu Path No Keypad Equivalent This object allows individual notification of the highest priority active fault alarm. The value in the table below is the largest number in its enumeration that corresponds to an active alarm. This object is set to zero if no fault alarms are active.



Enumerated N/A




<Device Name>.ActiveFault.Present_Value Enumeration

0 – No Active Alarms 208 – Airflow Fault 212 – Low Discharge Air Temp 216 – High Discharge Air Temp 220 – High Return Air Temp 224 – Duct High Limit 228 – Discharge Sensor Fail 244 – Control Temp Fault 250 – Emergency Stop Fault 252 – Freeze Fault

ED15112-8 93


nvoFaultAlarm DAC, SCC Yes SNVT_hvac_status 112 Property Value

0 – No Active Warnings 208 – Airflow Fault 212 – Low Discharge Air Temp 216 – High Discharge Air Temp 220 – High Return Air Temp 224 – Duct High Limit 228 – Discharge Sensor Fail 244 – Control Temp Fault 250 – Emergency Stop Fault 252 – Freeze Fault

Airflow Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Airflow Fault alarm is active (1) or not (0).






<Device Name>.AirflowFlt.Present_Value Enumeration

0 – normal 1 – Alarm


Airflow Switch Warning Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Airflow Switch Warning is active (1) or not (0).






<Device Name>.AFSwWrn.Present_Value Enumeration



94 ED15112-8

Conductivity Warning Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Conductivity Warning alarm is active (1) or not active (0). This variable applies only to unit configured for evaporative condensing.






<Device Name>.ConductivityWrn.Present_Value Enumeration



Control Temp Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Control Temperature Fault alarm is active (1) or not active (0).






<Device Name>.ControlTempFlt.Present_Value Enumeration



Dirty Filter Warning Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Dirty Filter Warning alarm is active (1) or not active (0).






<Device Name>.DrtyFltrWrn.Present_Value Enumeration


ED15112-8 95


Discharge Sensor Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Discharge Sensor Fault alarm is active (1) or not active (0).






<Device Name>.DischSensorFlt.Present_Value Enumeration



Duct High Limit Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Duct High Limit Fault alarm is active (1) or not active active (0). This variable only applies to units configured for supply fan VFDs.






<Device Name>.DuctHiLmtFlt.Present_Value Enumeration



Emergency Off Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Emergency Off Fault alarm is active (1) or not active (0).



96 ED15112-8




<Device Name>.EmergencyOffFlt.Present_Value Enumeration



Entering Fan Temp / Leaving Coil Temp Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Entering Fan Temp/Leaving Coil Temp Problem alarm is active (1) or not active (0).






<Device Name>.EFT_LCTPrb.Present_Value Enumeration



Entering Water Temp Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Entering Water Temperature Problem alarm is active (1) or not active (0). This variable only applies to units configured for a waterside condenser.






<Device Name>.EntWtrTmpPrb.Present_Value Enumeration



ED15112-8 97

Freeze Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Freeze Fault alarm is active (1) or not active (0).






<Device Name>.FreezeFault.Present_Value Enumeration



Freeze Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Freeze Problem alarm is active (1) or not active (0). This variable applies only to units configured for at least one of the following: waterside economizer, face and bypass heating, steam/hot water heating, chilled water cooling or face and bypass cooling.






<Device Name>.FreezePrb.Present_Value Enumeration



Heat Fail Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether or not the Heat Fail Switch is in alarm (Alarm (1) or Normal (0)).


Alarm N/A Enumeration 0-1 N/A




<Device Name>.HeatFailProb.Present_Value Enumeration

0 – Normal 1 – Alarm

98 ED15112-8


High Discharge Temp Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the High Discharge Temperature Fault alarm is active (1) or not active (0).






<Device Name>.HiDischTmpFlt.Present_Value Enumeration



High Pressure Circuit 1 Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the High Pressure Circuit 1 Problem alarm is active (1) or not active (0). This variable applies only to units configured for two or more mechanical cooling circuits.






<Device Name>.HiPressCkt1Prb.Present_Value Enumeration




This read-only BACnet object indicates whether the High Pressure Circuit 2 Problem alarm is active (1) or not active (0). This variable applies only to units configured for two or more mechanical cooling circuits.



ED15112-8 99








This read-only BACnet object indicates whether the High Pressure Circuit 3 Problem alarm is active (1) or not active (0). This variable applies only to units configured for three or more mechanical cooling circuits.










This read-only BACnet object indicates whether the High Pressure Circuit 4 Problem alarm is active (1) or not active (0). This variable applies only to units configured for four or more mechanical cooling circuits.









100 ED15112-8


This read-only BACnet object indicates whether the High Pressure Circuit 5 Problem alarm is active (1) or not active (0). This variable applies only to units configured for five mechanical cooling circuits.










This read-only BACnet object indicates whether the High Pressure Circuit 6 Problem alarm is active (1) or not active (0). This variable applies only to units configured for six or more mechanical cooling circuits.










This read-only BACnet object indicates whether the High Pressure Circuit 7 Problem alarm is active (1) or not active (0). This variable applies only to units configured for seven or more mechanical cooling circuits.



ED15112-8 101








This read-only BACnet object indicates whether the High Pressure Circuit 8 Problem alarm is active (1) or not active (0). This variable applies only to units configured for eight or more mechanical cooling circuits.









High Return Temp Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the High Return Temperature Fault alarm is active (1) or not active (0). This variable applies only to units configured for a return air temperature sensor.






<Device Name>.HiReturnTmpFlt.Present_Value Enumeration



102 ED15112-8

Low Discharge Temp Fault Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Low Discharge Temperature Fault alarm is active (1) or not active (0).






<Device Name>.LoDischTmpFlt.Present_Value Enumeration



Low Pressure Circuit 1 Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Low Pressure Circuit 1 Problem alarm is active (1) or not active (0). This variable applies only to units configured for two or more mechanical cooling circuits.






<Device Name>.LoPressCkt1Prb.Present_Value Enumeration




This read-only BACnet object indicates whether the Low Pressure Circuit 2 Problem alarm is active (1) or not active (0). This variable applies only to units configured for two or more mechanical cooling circuits.



ED15112-8 103








This read-only BACnet object indicates whether the Low Pressure Circuit 3 Problem alarm is active (1) or not active (0). This variable applies only to units configured for three or more mechanical cooling circuits.










This read-only BACnet object indicates whether the Low Pressure Circuit 4 Problem alarm is active (1) or not active (0). This variable applies only to units configured for four or more mechanical cooling circuits.









104 ED15112-8


This read-only BACnet object indicates whether the Low Pressure Circuit 5 Problem alarm is active (1) or not active (0). This variable applies only to units configured for five or more mechanical cooling circuits.










This read-only BACnet object indicates whether the Low Pressure Circuit 6 Problem alarm is active (1) or not active (0). This variable applies only to units configured for six or more mechanical cooling circuits.










This read-only BACnet object indicates whether the Low Pressure Circuit 7 Problem alarm is active (1) or not active (0). This variable applies only to units configured for seven or more mechanical cooling circuits.



ED15112-8 105








This read-only BACnet object indicates whether the Low Pressure Circuit 8 Problem alarm is active (1) or not active (0). This variable applies only to units configured for eight or more mechanical cooling circuits.









Mixed Air Temp Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Mixed Air Temperature Problem alarm is active (1) or not active (0). This variable applies only to units configured for a mixed air temperature sensor.






<Device Name>.MixAirTmpPrb.Present_Value Enumeration



106 ED15112-8

Outdoor Temp Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Outdoor Temperature Problem alarm is active (1) or not active (0). This variable applies only to units configured for an outdoor temperature sensor.






<Device Name>.OutdoorTmpPrb.Present_Value Enumeration



Return Temp Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Return Temperature Problem alarm is active (1) or not active (0). This variable applies only to units configured for a return air temperature sensor.






<Device Name>.ReturnTmpPrb.Present_Value Enumeration



Space Temp Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Space Temperature Problem alarm is active (1) or not active (0). This variable applies only to units configure for a space temperature sensor.



ED15112-8 107




<Device Name>.SpaceTmpPrb.Present_Value Enumeration



Sump Water Level Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Sump Water Level Problem alarm is active (1) or not active (0). This variable applies only to units configured for an evaporative condenser.






<Device Name>.SmpWtrLvlPrb.Present_Value Enumeration



Waterflow Switch Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Waterflow Switch Problem alarm is active (1) or not active (0). This variable applies only to units configured for a waterside condenser.






<Device Name>.WtrFlowSwPrb.Present_Value Enumeration



108 ED15112-8

Water Regulating Valve Problem Keypad Menu Path No Keypad Equivalent

This read-only BACnet object indicates whether the Water Regulating Valve Problem alarm is active (1) or not active (0). This variable applies only to units configured for head pressure control.






<Device Name>.WtrRegVlvPrb.Present_Value Enumeration



ED15112-8 109

BACnet Device Management

The following functions are specific to the BACnet device. These functions are used for maintenance and testing. A network management tool such as VTS is typically used to issue the network commands.

DeviceCommunicationControl - Disable The purpose of this command is to reduce network traffic for diagnostic testing of the BACnet network. When the BACnet Communication module receives a network command to Disable communications it stops communicating information to the network. An optional time may be specified for how long to suspend communications. The unit continues to operate during the Disabled state.

DeviceCommunicationControl - Enable When the BACnet Communication module receives a network command to Enable communications, MicroTech III AHU communications to BACnet is restored.

ReinitializeDevice (Reset) When the BACnet Communication module is capable of receiving a network ReinitializeDevice command to reboot itself (cold start or warm start). The funcationality of a cold and warm start are the same and simple reboot the BACnet Communication module. No password is required.

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Appendix A: Protocol Implementation Conformance Statement (PICS)

This section contains the Protocol Implementation Conformance Statement (PICS) for the MicroTech III Unit Controller from McQuay International as required by ANSI/ASHRAE (American National Standards Institute/American Society of Heating, Refrigeration, and Air Conditioning Engineers) Standard 135-2004, BACnet; A Data Communication Protocol for Building Automation and Control Networks.

BACnet Protocol Implementation Conformance Statement Date: February 2011

Vendor Name: McQuay International

Product Name: Unit Controller

Product Model Number: AHU

Application Software Version: 2506017307

Firmware Revision: 1.1.30s

BACnet Protocol Revision: Version 1 Revision 4

Product Description The MicroTech III Unit Controller with optional BACnet Communication Module is a microprocessor-based controller designed to operate McQuay International Air Handling (Applied Rooftop, Self-Contained, or Maverick II Commercial Rooftop) Units and be integrated into BACnet building automation systems.

The controller provides normal temperature, static pressure and ventilation control and alarm monitoring with alarm-specific component shutdown in critical system conditions. Access to temperatures, pressures, operating states, alarm messages, control parameters and schedules is available through an equipment-mounted keypad/display and the BACnet control network.

BACnet Standardized Device Profile Based on BIBBs supported, the MicroTech III Unit Controller with optional BACnet Communications Module is a BACnet Advanced Application Controller (B-AAC). Refer to the section below entitled BACnet Interoperability Building Blocks (BIBBs) Supported for a complete listing of BIBBS.

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BACnet Interoperability Building Blocks (BIBBs) Supported BIBB Name Designation

Data Sharing – ReadProperty – B DS-RP-B

Data Sharing – ReadPropertyMultiple – B DS-RPM-B

Data Sharing – WriteProperty – B DS-WP-B

Data Sharing – WritePropertyMultiple – B DS-WPM-B

Data Sharing – COV – B DS-COV-B

Data Sharing – ReadProperty – A DS-RP-A

Data Sharing – WriteProperty – A DS-WP-A

Data Sharing – COV – A DS-COV-A

Alarm & Event – Notification Internal - B AE-N-I-B

Alarm & Event – ACK –B AE-ACK-B

Alarm & Event – Information - B AE-INFO-B

Alarm & Event – Alarm Summary - B AE-ASUM-B

Scheduling – Internal - B SCHED-I-B

Device Management – Dynamic Device Binding – A DM-DDB-A

Device Management – Dynamic Device Binding – B DM-DDB-B

Device Management – Dynamic Object Binding – B DM-DOB-B

Device Management – Device Communication Control – B DM-DCC-B

Device Management – TimeSynchronization – B DM-TS-B

Device Management – UTCTimeSynchronization – B DM-UTS-B

Device Management – Reinitialize Device – B DM-RD-B

Device Management – List Manipulation – B DM-LM-B

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Standard Object Types Supported

Object-Type

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Optional Properties Supported Writeable Properties Not Required To Be Writeable

Analog Input Description Reliability COV_Increment High_Limit Low_Limit Notification_Class Min_Pres_Value Max_Pres_Value Deadband Acked_Transitions Event_Enable Notify_Type Limit_Enable Time_Delay Event_Time_Stamps

Present_Value1 COV_Increment2 Event_Enable

Analog Output Description Reliability Min_Pres_Value Max_Pres_Value COV_Increment Time_Delay Notification_Class High_Limit Low_Limit Deadband Limit_Enable Event_Enable Acked_Transistions Notify_Type Event_Time_Stamps

Present_Value COV_Increment2 Event_Enable

Analog Value Description Reliability Priority_Array Relinquish_Default COV_Increment Time_Delay Notification_Class High_Limit Low_Limit Deadband Limit_Enable Event_Enable Acked_Transistions Notify_Type Event_Time_Stamps

Present_Value1 COV_Increment2 Event_Enable

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Object-Type

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Binary Input Description Reliability Inactive_Text Active_Text Notification_Class Acked_Transitions Event_Enable Alarm_Value Notify_Type Time_Delay Event_Time_Stamps

Present_Value Event_Enable

Binary Output Description Reliability Inactive_Text Active_Text Notification_Class Feedback_Value Acked_Transitions Event_Enable Notify_Type Time_Delay Event_Time_Stamps

Present_Value Event_Enable

Binary Value Description Reliability Inactive_Text Active_Text Priority_Array Relinquish_Default Notification_Class Acked_Transitions Event_Enable Alarm_Value Notify_Type Time_Delay Event_Time_Stamps

Acked_Transitions Event_Enable Present_Value1

Device Description Location Active_Cov_Subsription (<=50) Local_Time Local_Date UTC_Offset ADPU_Segment_Timeout Daylight_Savings_Status Max_Segments_Accepted Max_Master (MS/TP only) Max_Info_Frames (MS/TP only)

Description Location Max_ADPU_Length_Accepted(1476>= x >=50)UTC_Offset Max_Segments_Accepted ADPU_Segment_Timeout (>100) APDU_Timeout (>100) Number_Of_APDU_Retries Segmentation_Supported Max_Master (MS/TP only) Max_Info_Frames (MS/TP only)

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Object-Type

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Multi-State Input Description State_Text Notification_Class Acked_Transitions Event_Enable Notify_Type Time_Delay Alarm_Values Fault_Values Reliability Event_Time_Stamps

Multi-State Output

Description Reliability State_Text Notification_Class Acked_Transitions Event_Enable Notify_Type Time_Delay Event_Time_Stamps Feedback_Value

Event_Enable

Multi-State Value Description Priority_Array Relinquish_Default Notification_Class Reliability Acked_Transitions Event_Enable Alarm_Values Fault_Values Notify_Type Time_Delay Event_Time_Stamps State_Text

Present_Value1

Event_Enable

Notification Class Description Object_Name Description Recipient_List (Max 20) Priority Ack_Required

Calendar Description Date_List (Max 10)

Schedule Weekly_Schedule Exception_Schedule

Object_Name Effective_Period Weekly_Schedule Exception_Schedule List_Of_Object_Property_Refs

1 Some objects of this type are read only. For those objects, the Present_Value is not commandable or writable. 2 Changes to this property do not take effect until the power is cycled on the unit controller. After changing COV_Increment, you must wait at least one minute before cycling power. Otherwise, this change will not be saved.

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Data Link Layer Options BACnet IP, (Annex J)

BACnet IP, (Annex J), Foreign Device

MS/TP master (Clause 9), baud rate(s): 9600, 19200, 38400, 76800

MS/TP slave (Clause 9), baud rate(s): 9600, 19200, 38400, 76800

Segmentation Capability Segmented requests supported Window Size: 4 for IP and 1 for MS/TP

Segmented responses supported Window Size: 4 for IP and 1 for MS/TP

Device Address Binding Static Device Binding

Yes

No

Networking Options Router, Clause 6 – List all routing configurations, e.g., ARCNET-Ethernet, Ethernet-MS/TP,

etc.

Annex H, BACnet Tunneling Router over IP

BACnet/IP Broadcast Management Device (BBMD)

Number of BDT entries:

Does the BBMD Support registration by Foreign Devices? Yes No

Character Sets Supported ANSI X3.4 IBM/Microsoft DBCS ISO 8859-1

ISO 10646 (UCS-2) ISO 10646 (UCS-4) JIS C 6226

Note: Support for multiple character sets does not imply they can be supported simultaneously.

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Index

Airflow Fault, 22, 84, 93 Airflow Switch, 23, 29 Airflow Switch (Warning), 23, 29 Airflow Switch Warning, 22, 84, 93 Alarm Notification, 84, 86, 87, 88 Alarm Value, 88 Alarm Value, 22 Application Mode, 15, 16, 19, 24, 28 Application Version, 21, 30 ASHRAE, 5, 7, 33, 75, 110 BACnet Standard Objects, 16, 19 BACnet/IP, 5, 9 BIBBs, 110, 111 Building Static Pressure, 19, 24, 30 Building Static Pressure Setpoint, 19, 24, 30 Clear Alarms, 21, 26, 85 Clearing, 85 Conductivity, 20, 25, 31 Conductivity Warning, 22, 84, 94 Control Temp Fault, 22, 84, 94 Control Temp Source, 20, 31 Control Temperature, 19, 32 Cooling Capacity, 19, 24, 32 Cooling Status, 19, 24, 32 Date, 9, 33, 113 Device Object, 8 Dew Point Setpoint, 20, 25, 33 Dew Point Temperature, 20, 25, 34 Dirty Filter Switch, 23, 34 Dirty Filter Warning, 22, 84, 94 Discharge Air Controller profile, 5, 14 Discharge Air Cooling Setpoint, 25 Discharge Air Heating Setpoint, 25 Discharge Air Temperature, 19, 24, 34 Discharge Sensor Fault, 22, 84, 95 doubly-terminated network, 13 Duct High Limit Fault, 22, 84, 95 Duct High Limit Switch, 23, 35 Duct Static Pressure, 16, 19, 24, 35, 69 Duct Static Pressure Setpoint, 16, 19, 24, 35 Economizer Capacity, 19, 24, 36 Economizer Enable, 15, 21, 25, 36 Economizer Status, 19, 24, 37 Eff Discharge Air Temp Setpoint, 21 Effective Cooling Discharge Setpoint, 61 Effective Cooling Enable Setpoint, 38 Effective Discharge Air Temperature Setpoint, 38 Effective Discharge Setpoint, 26 Effective Enable Setpoint, 26 Effective Heating Discharge Setpoint, 62 Effective Heating Enable Setpoint, 38 Effective Minimum Outdoor Damper Position Setpoint, 62 Effective Setpoint Output, 38, 75 Emergency Off Fault, 22, 84, 95 Emergency Off Switch, 23, 39 Emergency Override, 16, 19, 24, 39 Entering Fan / Leaving Coil Temp, 19, 24, 41 Entering Fan Temp / Leaving Coil Temp Problem, 22, 84, 96 Entering Water Temp Problem, 22, 84, 96 Entering Water Temperature, 19, 24, 42 Ethernet, 9 Example of BACnet Data Point, 7 Exhaust Fan Capacity, 42 Exhaust Fan Capacity Input, 15, 20, 25, 43 Exhaust Fan Status, 7, 19, 71 Fault Alarm, 21, 26, 92 Fault Alarms, 81, 82 free topology, 11, 13 Freeze Fault, 22, 84, 97 Freeze Problem, 22, 23, 84, 97

Freeze Switch (Fault), 23, 43, 44, 97 Freeze Switch (Problem), 23, 43 Full Reference, 7 Heating Capacity, 19, 24, 44 Heating Status, 19, 24, 45 High Discharge Temp Fault, 22, 84, 98 High Pressure Circuit 1 Problem, 22, 84, 98 High Pressure Circuit 1 Switch, 23, 45 High Pressure Circuit 2 Problem, 22, 84, 98 High Pressure Circuit 2 Switch, 23, 46 High Pressure Circuit 3 Problem, 22, 84, 99 High Pressure Circuit 3 Switch, 23, 46 High Pressure Circuit 4 Problem, 22, 84, 99 High Pressure Circuit 4 Switch, 23, 46 High Pressure Circuit 5 Problem, 22, 84, 100 High Pressure Circuit 5 Switch, 23, 47 High Pressure Circuit 6 Problem, 22, 84, 100, 101 High Pressure Circuit 6 Switch, 23, 47, 48 High Return Temp Fault, 22, 84, 101 High Return Temp Problem, 84 HVAC Unit Type Identifier, 26, 48 In Alarm, 26, 85 Instance, 7 interoperable, 5, 11 IP address, 9 IP Subnet Mask, 9 Local OA Temperature, 21, 26, 49 Local Space Temperature, 21, 26, 49 LonWorks Variables, 11, 16, 24 Low Discharge Temp Fault, 22, 84, 102 Low Pressure Circuit 1 Problem, 22, 84, 102 Low Pressure Circuit 1 Switch, 23, 50 Low Pressure Circuit 2 Problem, 22, 84, 102 Low Pressure Circuit 2 Switch, 23, 50 Low Pressure Circuit 3 Problem, 22, 84, 103 Low Pressure Circuit 3 Switch, 23, 50 Low Pressure Circuit 4 Problem, 22, 84, 103 Low Pressure Circuit 4 Switch, 23, 51 Low Pressure Circuit 5 Problem, 22, 84, 104, 105 Low Pressure Circuit 5 Switch, 23, 51 Low Pressure Circuit 6 Problem, 22, 84, 104 Low Pressure Circuit 6 Switch, 23, 52 MAC address, 9 Maximum Discharge Air Heating Setpoint, 20, 25, 53 McQuay AHU Unit Status, 19, 24, 53 Minimum Discharge Air Cooling Setpoint, 20, 25, 54 Minimum Send Time, 26, 55 Mixed Air Temp Problem, 23, 84, 105 Mixed Air Temperature, 19, 24, 55 MSTP, 5, 10 Network Discharge Air Cooling Setpoint, 20, 56 Network Discharge Air Heating Setpoint, 20, 56 Neuron, 13, 14 Notice, 4 Notification, 17 Notification Class - Faults, 21, 86 Notification Class - Problems, 21, 87 Notification Class - Warnings, 21, 88 Object Identifier, 7 Object Request, 27, 56 Object Status, 27, 57 Object Type, 7 Occupancy, 15, 19, 24, 58, 59 Occupancy Mode, 16, 19, 24, 59, 60 Occupancy Scheduler Input, 21, 25, 60 Occupied Cooling Setpoint, 16, 20, 25, 61 Occupied Heating Setpoint, 16, 20, 25, 62 Outdoor Air Damper Min Position Input, 21, 26 Outdoor Air Damper Minimum Position Input, 62 Outdoor Air Damper Position, 62

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Outdoor Air Temperature, 15, 16, 19, 24, 63 Outdoor Air Temperature Input, 20, 25, 63 Outdoor Airflow, 20, 25, 64 Outdoor Temp Problem, 23, 84, 106 Primary Cool Enable, 15, 25, 64 Primary CoolEnable, 21 Primary Heat Enable, 15, 21, 25, 65 Problem Alarm, 21, 26, 91 Problem Alarms, 82 Protocol Implementation Conformance Statement, 5, 110 Receive Heartbeat, 20, 25, 66 Reheat Capacity, 20, 25, 67 Relative Humidity, 20, 25, 67 Relative Humidity Input, 15, 21, 26, 68 Relative Humidity Setpoint, 20, 25, 68 Remote Return/Exhaust Fan Capacity Control Flag, 20, 24, 68, 71 Remote Supply Fan Capacity Control Flag, 19, 24, 69 Return Air Temperature, 16, 19, 24, 70 Return Fan Capacity Input, 15, 20, 25, 71 Return Temp Problem, 23, 106 Return/Exhaust Fan Capacity, 19, 24, 70 Return/Exhaust Fan Status, 24 Send Heartbeat, 25, 72 service pin, 14 Space CO2, 20, 25, 72 Space Comfort Controller, 5, 11, 14 Space IAQ Input, 15, 21, 26, 73 Space Setpoint Type, 75 Space Temp Problem, 23, 84, 106

Space Temperature, 15, 19, 24, 73 Space Temperature Input, 21, 25, 73 Standard Configuration Parameter Type, 11 Standard Network Variable Types, 11 Sump Pump Fail Problem, 23, 84, 107 Sump Pump Switch, 23, 74 Supply Fan Capacity, 19, 24, 74, 75 Supply Fan Capacity Input, 15, 19, 24, 69, 75 Temperature Setpoint Input, 26, 38, 75 Time, 9, 75, 113 Type Enumeration, 7 UDP, 9 Unit State, 16, 19, 24, 76 Unit Status, 19, 85 Unit Support, 20, 77 Unoccupied Cooling Setpoint, 16, 20, 25, 77 Unoccupied Heating Setpoint, 16, 20, 25, 78 VAV Box Output, 19, 24, 78 Warning Alarm, 21, 26, 90 Warning Alarms, 83 Water Flow Switch, 23, 79 Water Flow Switch Input, 15 Water Regulating Valve, 23, 79 Water Regulating Valve Problem, 23, 84, 108 Waterflow Switch, 21 Waterflow Switch Input, 26, 80 Waterflow Switch Problem, 23, 84, 107 XIF, 14

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