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Showing content with the highest reputation on 01/29/2014 in all areas

  1. Hi JoS0, I don't know if I understand correctly what you mean, but I assume that you set up the the PID only with help of the PID FB "RUN Auto Tune". So the PLC tries to find out the values for P, I and D itself and stores them. I do it differently: I set a Positive Transaction of SB2 (Power Up) and as second possible condition a positive transaction of a MB (Manual Config, e.g. MB10) to trigger the PID FB "Configuration". That way the power up bit or the Manual Config Bit can run the Configuration of the PID with my entered values for Setpoint, Upper/Lower Input/Output Level, P-Val
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  2. Hello Jo, I don't know exactly if I can help, but at least I can share my experiences with Unitronics PID. First thing first: I saw that your Output Limits are set to 820 to 4000. You wrote that you want to go with 0 to 10 V, that would be 0 to 4095 in Units for the AO, but that was just something that came to my attention. But be warned, by limiting the output to 820, you will never fully close the valve (just to say). But going to the PID itself: I found it easier to limit the action to P and I only, so mostly I set the D value to "0". Next thing is: as described in help file:
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