Control

Mandatory Control Valve Feedback

A

Thread Starter

azylan

Is it mandatory to provide Control Valve's position feedback signal in DCS when position feedback signal doesn't have any process interlock?
 
R

Roy Matson

No, usually if there is a process interlock I'm used to seeing it taken care of by a valve position switch.

If it's not a vital interlock it could be just interlocked with the signal to the valve.

>Is it mandatory to provide Control Valve's position
>feedback signal in DCS when position feedback signal doesn't
>have any process interlock?
 
D

dmcdowe1

It is not mandatory. We do however use the feedback to verify that the control valve has traveled to the requested position. This verification is used as a warning or alarm depending on how critical it is for the process.

> Is it mandatory to provide Control Valve's position feedback signal in DCS when
> position feedback signal doesn't have any process interlock?
 
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