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To rapidly stabilize the control conditions even when overshooting occurs, shorten
the integral time and lengthen the differential time.
●
Reducing long-cycle oscillation
If oscillation occurs with a longer cycle than the integral time setting, it means that
integral operation is strong.The oscillation will be reduced as the integral time is
lengthened.
●
Reducing short-cycle oscillation
If the oscillation cycle is short and oscillation occurs with a cycle approximately the
same as the differential time setting, it means that the differential operation is strong. The
oscillation will be reduced as the differential time is shortened.
If oscillation cannot be reduced even by setting the differential time to 0, then either
lower the proportional gain or raise the PID primary delay time constant.
Code
Name
Setting Range
F9.07
PID output delay time
0.00~10.00S
【
0.00S
】
Frequency instruction output delay time setting of PID control.
Code
Name
Setting Range
F9.08
PID control deviation limitation
0.0
～
100.0%
【
0.0%
】
Bias limit defines the maximum bias between the feedback and the preset.PID stops
operation when the bias is within this range.Setting this parameter correctly is helpful to
improve the system output accuracy and stability.
