delta v course 7009-17

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FISHER-ROSEMOUNT SYSTEMS Multifunction Cardourse 7009 - Rev 3 - 4/15/0117-1

TM

Multifunction Card

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ObjectivesUpon completion of this module you will be able to:

Define the purpose of the Multifunction Card

Define the screw terminals used on the terminal block

Define the input frequencies for both sine and square waves

Define the user parameters on a pulse input channel

Define the pulse input function block parameters used

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Power

Error

Multifunction Card &

Terminal BlockLEDs:

Green - On powered and self tests are good.

Red ON- Failed and/or not communicating to the controller.

Red Flashing - Card not being scanned by controller

Multi-function cardsupports four channels configured as

Discrete Inputs (DI) or Pulse Inputs (PI).

Multi-function terminal blockhas 32 terminals available. The

matrix below shows the terminals used with current release

capabilities for the card and the terminal connections for use

with future enhancements.

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Multifunction Terminal Block MatrixPosition 1 Position 2 Position 3 Position 4 Position 5 Position 6 Position 7 Position 8

1

AI-Ch 1

5

AI-Ch2

9

AI-Ch3

13

AI-Ch4

17 (+)

DI-Ch1

21 (+)

DI-CH2

25 (+)

DI-Ch3

29 (+)

DI-Ch4

Top

Row

2AI-RTN 6AI-RTN 10AI-RTN 14AI-RTN 18 (-)DI-RTN 22 (-)DI-RTN 26 (-)DI-RTN 30 (-)DI-RTNSecondRow

3

AO-Ch1

7

AO-Ch2

11

+24VDC

15

+24VDC

19 (+)

DO-Ch1

23 (+)

DO-Ch2

27 (+)

DO-Ch3

31 (+)

DO-Ch4

Third

Row

4

AO-RTN

8

AO-RTN

12

24V-RTN

16

24V-RTN

20

DO-RTN

24

D0-RTN

28

DO-RTN

32

DO-RTN

Bottom

Row

Reserved for future use Currently being used

The Multifunction Card was designed to support high frequency pulse input.

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INPUTS

Input frequency sine wave 10Hz - 50KHz, Square Wave 0.1Hz - 50KHz

Input accuracy 0.1% reading (over 0.1Hz - 50KHz)

Resolution +/- 1 pulse

Minimum pulse width 10us.

Maximum input voltage 24VDC+/ 10%

Detection level for ON 4.8VDC (min.)

Detection level for OFF 1.0VDC (max.)

Isolation Each channel is optically isolated from the system at 250 VAC

Resolution counter 32 bits

Pulse Input Specifications

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Multifunction Card Channels

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Using DeltaV Explorer

TheMultifunction Cardhas four channels used asDiscrete Inputs or as Pulse

Inputs. The Multifunction Card is specifically designed for high frequency pulse

inputs.

The Channel properties dialog box includes:

Enable: A check in this box enables the port to be the channel on the

Multifunction card.

Description: Up to 40 characters for a description to appear in Explorer

Channel Type: The user chooses between Discrete Input and Pulse

Input.

Device Tag: The user may enter a unique name, up to 16 characters, for

each channel. The example above shows Pulse-1.

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The Pulse Input Channelparameters include:

Counter_In: Usable in control strategies as an external referenceRawCount.

Reset_Count: Usable in control strategies as an external reference.

Writing a non-zero number to this parameter clears the Counter_In

parameter.

Channel Type: The user chooses between Discrete Input and Pulse

Input.

Device Tag: A unique name, up to 16 characters, for each channel.

The example above shows Pulse-1.

Frequency: Only valid I/O_In parameterto a pulse input function

block, also usable in control strategies as an external reference.

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The Pulse Input channelsprovide a count and frequency. The signal frequency is

calculated from the number of pulses received over a configured scan period. You

can define the scan period with the FILTERparameter. In selecting the right filterfor the application, you must determine what emphasis should be placed on

precision and what should be placed on response, particularly for slower

frequencies (below 250Hz). The default filter is 1 second.

Filter Parameter: Selecting FILTER Parameter Properties opens theFILTER Propertiesbox. A drop-down window titledNamed Setprovides

you with the predefined filter values that can be used.

As the filters increase, the scan time increases. As the filters decrease, so does the

scan time. Larger filters will give you more precision, but the longer scan rate will

decrease the response to the frequency changes.

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Pulse Input Function Block

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Pulse Input Function BlockUsing DeltaV Control Studio

Drag n drop a Pulse Input function blockfrom the I/O category of the function

block palette.

Example: A turbine meter used to measure volumetric flow of a gas steam. Thepulse input function block measuring volumetric flow of a natural gas stream.

Pulse Input function block parameters:

I/O_In Use the browser to select the DST for this input

Out_Scale 0 to X, the range of the meter, used only to back calculate

the Field_Val parameter in percent

Because the meter is pre-set to measure a specific unit, you are permitted to

designate

PULSE_VAL Converts the frequency from the card, from pulses to EU

in the calculation of PV

TIME_UNITS The lapsed time over which a single pulses units are

counted

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Summary What is the purpose of the Multifunction Card?

What screw terminals are used for the Pulse Input device

connections?

What is the input frequency for a sine wave input?

Name two parameter of the Pulse input channel that may be used as

external references.

When using a Multifunction Card pulse input channel, what is the

only valid parameter for I/O_IN to the Pulse Input function block?

delta v course 7009-17

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