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Detail faceplate for PID controller does not display field value during simulate

The detail faceplate for our AI loops and PID control loop allows for simulating the loop and displays the simulate value and the field value. When we simulate a PID loop, the field value does not display and instead the field value tracks with the simulate value entered. Does anyone know why the field value does not correctly display on the detail faceplate when the PID loop is in simulate?

When we simulate an AI loop the field value accurately displays on the detail faceplate along side of the simulated value, however for the PID value it does not work. Is there another parameter in the PID block that needs set to accurately display the field value instead of tracking with the simulate value?

The links on the detail faceplate for PID loop are as follows.

Simulate value: DVSYS.@MOD@/PID1/simulate.f_sValue

Field value: DVSYS.@MOD@/PID1/simulate.f_fValue

johndaulton

• 15 Oct 2018 7:35 PM
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2 Replies

• Matt Stoner

  

  • 15 Oct 2018 8:19 PM

  Where is the Input DST assigned, Is it on the PID block or on an AI block that is wired to the PID block?
  
  I believe that the only time the Simulate Field Value works on the PID block is when you have the Input being configured on the PID block but it has been > 15 years or more since I have actually used IO on the PID block so not entirely sure. If you do have it wired to the PID block it would appear you have found an "opportunity" and should log this issue with the Global Support Center.

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• johndaulton

  

  • 15 Oct 2018 8:31 PM

  In reply to Matt Stoner:

  The DST is assigned to an AI block. It is fed from an AI block to a calc block and then passed on to the PID block.

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