YASKAWA H6B1A002, Technical Reference

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5.2 b: Application
212 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
• 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.
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System Units
The drive uses b5-38 [PID User Unit Display Scaling] , b5-39 [PID Setpoint Display Digits] , and b5-46 [PID Unit
Display Selection] together to apply the user-set PID setpoint and display units at any time.
Parameter
b5-38
sets the scaling and
b5-46
sets the units-text to the parameters and monitors shown in Table 5.26 and
Table 5.27 .