YASKAWA GA700 Series

12.3 b: Application
672 YASKAWA SIEPC71061705H GA700 Series Technical Manual
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.
■ EZ Sleep/Wake-up Functionality
Set b5-89 = 1 [Sleep Method Selection = EZ Sleep/Wake-up] to enable the EZ Sleep/Wake-up function.
Note:
• When b5-89 = 0 [Sleep Mode Selection = Standard], the EZ Sleep function and related parameters are disabled. Parameter b5-91 [EZ
Sleep Minimum Speed] is not included in this rule.
• Set b5-89 = 1 to disable b5-15 [PID Sleep Function Start Level].
Setting Parameter Description
b5-90 [EZ Sleep Unit] Sets the unit of measure for b5-92 [EZ Sleep Level]. When b5-90 = 0 [0.1Hz units], the setting range of b5-
91 [EZ Sleep Minimum Speed] is 0.0 to 590.0 Hz. When b5-90 = 1 [rev/min], the setting range is 0 to 35400
min-
-1
(r/min).
Note:
When you change b5-90, the value of b5-92 is not automatically updated.
b5-91 [EZ Sleep Minimum Speed]
This parameter sets the lower limit for PID output. The drive uses the largest value of b5-91, b5-34 [PID
Output Lower Limit], and d2-02 [Frequency Reference Lower Limit] to internally set the lower limit of PID
output. The b5-89 setting does not have an effect.
b5-92 [EZ Sleep Level] When the output frequency or motor speed is less than the value of b5-92 for longer than the value of b5-93
[EZ Sleep Time], the drive does to sleep.