Emerson Exchange 365

PID output 0 at the process startup

Hi!

I have a question before process startup according to control narrative Control Valve should be close.

How I can achieve this.

On the basis of valve feedback I can start the process otherwise if i got the open feedback I will not able to start the process.

 

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OZ123

• 4 Aug 2015 3:00 PM
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1 Reply

• GeloCortez

  

  • 5 Aug 2015 12:06 AM

  Hi there,
  
  Use a Conditional Block (put your process startup logic here) and linked that OUT to PID TRK_IN_D and set TRK_VAL to zero. just make sure Tracking is enabled in PID options
  
  so when that CND block becomes true, PID goes to LO (local override) and sets its PID OUT = TRK_VAL
  
  I like using that tracking instead of putting the PID to MAN and sets its OUT to zero. in this confif, CRO can differentiate what causing PID out to ZERO
  
  Regards,
  Gelo

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