12.3 b: Application
688 YASKAWA SIEPC71061705H GA700 Series Technical Manual
■ b8-20: E-Save Search Width
No.
(Hex.)
Name Description
Default
(Range)
b8-20
(0B41)
Expert
E-Save Search Width
Sets the amplitude of Energy-saving control search operations.
1.0 degrees
(0.1 - 5.0 degrees)
An increase in the value can make the operational efficiency better. However, if the load inertia is small, it may be
necessary to adjust the value to prevent machine vibration.
Note:
• If low inertia causes vibration in the machine, decrease the setting value in 1.0-degree increments and check the response.
• To make the motor more efficient, increase the setting value in 1.0-degreee increments until the point immediately before machine
vibration starts to occur.
■ b8-21: PM E-Save Search Gain
No.
(Hex.)
Name Description
Default
(Range)
b8-21
(0B42)
Expert
PM E-Save Search Gain
Sets the gain of Energy-saving control search operations.
0.3Hz
(0.1 - 20.0 Hz)
When you decrease the value of C5-01 [ASR Proportional Gain 1], also decrease the value of b8-21 to keep the
correct ratio.
■ b8-22: PM E-Save Search LPF Cutoff Freq
No.
(Hex.)
Name Description
Default
(Range)
b8-22
(0B43)
Expert
PM E-Save Search LPF
Cutoff Freq
Sets the frequency of the filter used to extract the high-efficiency phase from search operations.
Usually it is not necessary to change this setting.
10.0 Hz
(1.0 - 30.0 Hz)
■ b8-23: PM E-Save Search Limit
No.
(Hex.)
Name Description
Default
(Range)
b8-23
(0B44)
Expert
PM E-Save Search Limit
Sets the search operations output limit. Usually it is not necessary to change this setting.
15.0 degrees
(0.0 - 30.0 degrees)
When the motor characteristics are correct, increase this value to make the motor more efficient.
■ b8-24: PM E-Save High Freq ACR Gain
No.
(Hex.)
Name Description
Default
(Range)
b8-24
(0B45)
Expert
PM E-Save High Freq ACR
Gain
Sets the gain for high-frequency current control.
200.0 Hz
(100.0 - 1000.0 Hz)
Note:
If the drive detects oC [Overcurrent], decrease the value.
■ b8-25: PM E-Save Search Start Level
No.
(Hex.)
Name Description
Default
(Range)
b8-25
(0B46)
Expert
PM E-Save Search Start
Level
Sets the start level for search operations.
10.0%
(0.0 - 100.0%)
Note:
If there is vibration in the machine, increase the value.
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