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Seeking advice on PID single-loop control for Siemens 200Smart PLC

2019-12-21View Original

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I’m seeking advice from those with more experience in instrumentation. I’ve just started learning the basics of PLC programming, and I tried to create a system with 5 single-loop controllers. Today, none of them worked properly: no matter how the measured value PV changed, the analog output remained at a constant value of 5530 (4 milliamps). I hope experts can give me some guidance. Thank you

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