LabVIEW PID uses derivative of Process Variable

04-01-2011, 08:00

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Re: LabVIEW PID uses derivative of Process Variable

It's not uncommon to use the derivative of the output (since the output is continuous, you don't have problems with step changes, and the output generally moves in a constant direction relative to the error). But the derivative of the PV doesn't make a lot of sense unless the VI was designed with a non-moving setpoint in mind.

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