Setting Up A WirelessHARTNetworkPresenter

Steps for Planning a Wireless Project

1. Scope the project (objectives)• Monitoring or Control• Asset Management

2. Planning the Network (Best Practices)

• Segmentation and network capacity

• Geographic layout & P&ID’s3. Host Integration

• Integrate the gateway into the system

• Security • Commissioning

Scope the Project (Objectives)

• Process monitoringReduce Operator RoundsAd hoc low cost measurement to improve process visibilityHealth, safety, environmental monitoringOpen loop or non-critical control

• Asset MonitoringOptimize maintenance scheduleMonitor critical assets

Controller with bus (Modbus – Profibus Gateway connection

WirelessHART Instrument MESH

Gateway Gateway

Asset OptimisationEthernet connection

WirelessHART Instrument MESH

Gateway Gateway

AO WorkplaceCMMS

Device Location

• Locate Instruments based upon segmentation criteria

• Check coverage via scaled site drawing

• Locate repeaters as required

• The gateway can be moved into the plant (check certification)

• You could use directional or remote antennae

Understanding the Network Components

• One Network Manager

• Multiple Gateways (Only one per wireless network)

• Multiple Access Points per Gateway(for Redundancy and Throughput)

• Devices Per Access Point =Average Update Rate (Sec) X 30

1Sec AUR X 30 = 30 Devices60Sec AUR X 30 = 1800 Devices if faster update/more devices then add an Access Point!

AccessPoint

AccessPoint

GatewayWirelessHandheld

Network Manager

Security Manager

WirelessAdapter

HART-enabledField Devices

WirelessHARTField Devices

Process AutomationController

Host Application(e.g., Asset Management)

Host System Communication

• Industry Standard ProtocolsEthernet• Modbus TCPIP• OPC• FOUNDATION Fieldbus HSE• ProfiNet• Https• XML• VPN

Serial (RS232/RS485)• Modbus RTU• Profibus DP• HART/485

GatewayPLC/Controller

Wired Wireless

Ethernet

Fiber Optic

Serial

Bandwidth

Cyclic and Acyclic

GatewayPLC/Controller

Wired Wireless

Ethernet

Fiber Optic

Serial

Bandwidth

Cyclic and Acyclic

Host Data Capacity

• Serial Data CapacityData telegram size may have a limit (244 bytes Profibus DP)

• Controller I/O CapacityMay be based upon TAG limit or memory

• Gateway CapacityMay be designed for specific network size

10001001101

110

GatewayPLC/Controller

Wired Wireless

Ethernet

Fiber Optic

Serial

Bandwidth

Cyclic and Acyclic

GatewayPLC/Controller

Wired Wireless

Ethernet

Fiber Optic

Serial

Bandwidth

Cyclic and Acyclic

HCF Cooperates with WCTWirelessHART Mesh NetworkWirelessHART Mesh Network

Interface

CommunicationTechnology

CommunicationTechnology

Specified by WCT

Specified by the respective organization

Validated Specifications in 2009

Gateway

Accessing Cyclic Data

• Mapping PV to registers –Function blocks or modules

Gateway

Register TAG45001 TT101.PV45003 TT102.PV40005 PT506.PV45007 LT699.SV

Modbus RegisterMapping

Database RegisterTT101A 45001TT102A 45003PT506A 45005LT699A 45007

Modbus

System

Accessing Cyclic Data

• Mapping PV to registers –Function blocks or modules

Gateway

Module Device TAGM1 TT101.PVM2 TT102.PVM3 PT506.PVM4 LT699.SV

Profibus ModuleMapping in Gateway

Database Slave/Module

TT101A M1TT102A M2PT506A M3LT699A M4

Profibus DP

System

Accessing Cyclic Data

• Mapping PV to registers –Function blocks or modules

Gateway

TransducerBlock Device TAGTT101_TB.HART_PV TT101.PVTT102_TB.HART_PV TT102.PVTT506_TB.HART_PV PT506.PVTT699_TB.HART_SV LT699.SV

FF TransducerMapping in Gateway

Cyclic data access to

transducer block

System

HSE

4-20 mA Control Loop

Existing HART Device

Asset Management SystemExisting non-HART

Control System

WirelessHART Device• Battery Powered• Solar Powered• Field Powered

WirelessHARTAdapter WirelessHART

GatewayPV + HART DataPV + HART Data

HARTDATA

From Wired …To Wired + Wireless = WirelessHART

Establishing the Network

Control or Asset Management

System

WirelessHARTGateway

WirelessHART Mesh Network

Handheld Terminal

Summary

• Pick the appropriate “physical” connection• Select the appropriate protocol• Understand the constraints of the system

interface and gateway• Continuously monitor the network diagnostics