YASKAWA GA800

12.3 b: Application
748 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Note:
• The PID Sleep function is enabled when PID control is disabled.
• When the PID Sleep function is triggered, the drive will stop the motor as specified by b1-03 [Stopping Method Selection].
■ Fine-Tuning PID
Fine-tune the following parameter settings to have PID control eliminate problems with overshoot and oscillation.
• b5-02 [Proportional Gain (P)]
• b5-03 [Integral Time (I)]
• b5-05 [Derivative Time (D)]
• b5-08 [PID Primary Delay Time Constant]
Purpose Procedure Results
Prevent overshoot. • Set b5-05 [Derivative Time (D)] to a smaller value.
• Set b5-03 [Integral Time (I)] to a larger value.
Quickly stabilize control. • Set b5-05 [Derivative Time (D)] to a larger value.
• Set b5-03 [Integral Time (I)] to a smaller value.
Prevent long-cycle oscillations. Set b5-03 [Integral Time (I)] to a larger value.
Prevent short-cycle oscillations. • Set b5-05 [Derivative Time (D)] to a smaller value.
• If you set b5-05 = 0.00 [Derivative Time (D) =
disabling D control] and it does not stop
oscillation, then set b5-02 [Proportional Gain (P)]
to a smaller value or set b5-08 [PID Primary
Delay Time Constant] to a larger value.