ControlStandardLib 1.4-7 Pidcc Block problem

Hi all

I am facing a problem in ControlStandardLib 1.4-7 Pidcc Block PID_OUTPUT . Sometime the OUTPUT of the PID gives a very large number (i.e -1.#J or 1.$) which is beon the output range (0-100). we even the MV and SP seem to be good . Trend Display is attached with it .. RampSoak is the SP for PID . Can anyone please suggest anything regarding this problem .

Thanks in Advance

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Himadricool Rank: 3954

Asked 1 year ago

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Answers

Looks like a divide by zero error.

Has "other logic" been added to this PID ? Eg, adaptive gain, forcing limits, output tracking etc ? What mode is the controller in when this happens ?

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