Honeywell SMV 3000 Using Transmitter to Simulate PV Input, Using SMV Transmitter in Input Mode

7.4Using Transmitter to Simulate PV Input

Using SMV

Transmitter in Input

Mode

CAUTION

ATTENTION

You can use an SMV 3000 transmitter to simulate a PV input value through the transmitter’s input mode. This feature is useful to check a PV’s affect on the transmitter’s output and compare expected readings on other analog instruments in the loop such as recorders, controllers, and positioners. For SMV transmitters operating in DE mode, inputs can be simulated for each PV to check the transmitter’s outputs on Universal Station displays with our TPS/TDC systems.

Using the SCT, you can tell the transmitter to change a PV input to any acceptable range value and maintain that input. This makes it easy to check PV input operation through the accurate simulation of input signals. This is especially helpful in verifying the affect of a given input on the PV4 calculated flow rate output.

NOTE: The input mode overrides the output mode.

When the transmitter is in the input mode:

•The simulated PV input value is substituted for the measured input

•The output reflects the simulated input.

For SMV transmitters that are digitally integrated with Honeywell’s TPS/TDC systems, note that PV readings on Universal Station displays will be flagged as BAD PV although the “PVRAW” reading will continue to be displayed will reflect the simulated input.

Input Mode Procedure The procedure in Table 21 outlines the steps for using the transmitter in its input mode and clearing the input mode.

Table 21 Using SMV Transmitter in the Input Mode

Step

1

2

3

4

Action

Connect SCT to SMV and establish communications. (See Subsection 5.2 for procedure, if necessary.)

Be sure any switches that may trip alarms or interlocks associated with analog loops are secured or turned off.

Perform Upload of the SMV database to the SCT.

For example purposes we want to simulate the PV1 input while monitoring PV4 output.

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