Hi all, im sure this is going to be an easy answer. With a simple PID function block, why is it when you place the block mode in MAN mode and increase the output setpoint via the faceplate, the output value goes straight to the desired value, but when reducing the output value in MAN mode, the value slowly reduces to the desired value?
Are you seeing this behavior only when performing the change through a faceplate or does this also happen via control studio?
If through control studio also, is the PID output cascaded into an AO or is it direct to I/O? If cascaded into an AO, is there a SP Rate limiter placed on the AO? (Is it possible the feedback you are looking at is actually the AO/PV, and it is rate limited, in other words)
Are you seeing this behavior only when performing the change through a faceplate or does this also happen via control studio? If through control studio also, is the PID output cascaded into an AO or is it direct to I/O? If cascaded into an AO, is there a SP Rate limiter placed on the AO? (Is it possible the feedback you are looking at is actually the AO/PV, and it is rate limited, in other words)