Thread: LabVIEW PID uses derivative of Process Variable
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Unread 04-01-2011, 02:59
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Re: LabVIEW PID uses derivative of Process Variable
You're right, that doesn't make sense.
Perhaps that error wasn't caught because people don't use very large coefficients for Derivative, and this VI is not very maintainable.

If the intent is to get rid of noise in the Setpoint (that is, variation in the Setpoint much faster than the mechanism can respond), then the 2nd derivative of the PV could be used.
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