Whoopsie

PID Start from 0%

2 posts in this topic

Hello,

I'm trying to find a solution to start a PID from 0% output.

So let's say i have a pump that start from 0% en need to increase by PID to the output % to control on the set-point. When the pump stops the PID keep controlling the output on the value it was. We want to start from 0% again when the pump start.

At this moment we do it by setting the PID into manual bij using .MO and we set te .TIE value to 0.0. But then every time we will see a manual hand on SCADA when the pump stops.

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Here is what comes to mind.  Run the PID all the time.  Use a setpoint of zero and a P of 25 or some huge number when the pump is off.  When the pump turns on use your true SP and a lower / realistic  P value.

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