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Hello to all, I test the PID Manager function block and it’s work fine. I am having problem with limiting PID output to in range 0-100.
If error is negative the PID output value must stop to 0, when the error becomes positive it must start form 0 to 100. Could I do that in some way ?
The PID output is limited to ±100% inside the FB. Normally in the PID regulations it’s necessary to have a regulation that’s work bidirectionally to correct the error when it’s negative or near to “0”.
If your requirements are to manage a one quadrant regulation, you can discard the output values less than 0. Obviously the internal I and D errors increasing if the error remains negative for a time, so it’s necessary to disable the PID regulation (Or only the I and D corrections) after a time that the error remains negative.
Hello, thank you for answer and help. My first idea was to limit PID output and somehow disable increasing negative value, now you give me a clear answer.
I hoped that there was limits inside the FB but this is also fine.
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