12.10 n: Special Adjustment
1028 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ n8-45: Speed Feedback Detection Gain
No.
(Hex.)
Name Description
Default
(Range)
n8-45
(0538)
Speed Feedback Detection
Gain
Sets the internal speed feedback detection reduction unit gain as a magnification value. Usually it is
not necessary to change this setting.
0.80
(0.00 - 10.00)
Adjust this parameter in these conditions:
• If vibration or hunting occur, increase the setting value in 0.05 unit increments.
• If the responsiveness of torque and speed is unsatisfactory, decrease the setting value 0.05 unit increments and
examine the response.
■ n8-46: PM Phase Compensation Gain
No.
(Hex.)
Name Description
Default
(Range)
n8-46
(0539)
Expert
PM Phase Compensation
Gain
Sets the gain to compensate for phase differences. Usually it is not necessary to change this setting.
0.3
(0.0 - 10.0)
If there is vibration in the motor, increase the value. When you must detect oC [Overcurrent] or ov [DC Bus
Overvoltage], set this parameter to a low value.
■ n8-47: Pull-in Current Comp Filter Time
No.
(Hex.)
Name Description
Default
(Range)
n8-47
(053A)
Pull-in Current Comp Filter
Time
Sets the time constant the drive uses to align the pull-in current reference value with the actual
current value. Usually it is not necessary to change this setting.
5.0 s
(0.0 - 100.0 s)
Adjust this parameter in these conditions:
• If the time for the reference value of the pull-in current to align with the target value is too long, increase the setting
value.
• If vibration or hunting occur, decrease the setting value in 0.2 unit increments.
• If the motor stalls during run at constant speed, decrease the setting value in 0.2 unit increments.
■ n8-48: Pull-in/Light Load Id Current
No.
(Hex.)
Name Description
Default
(Range)
n8-48
(053B)
Pull-in/Light Load Id
Current
Sets the d-axis current that flows to the motor during run at constant speed as a percentage where E5-
03 [PM Motor Rated Current (FLA)] = 100%.
30%
(0 - 200%)
Adjust in the following situations.
• Slightly reduce this value if there is too much current when driving a light load at a constant speed.
• Increase the setting value in steps of 5% when hunting or vibration occurs during run at constant speed.
• Increase the setting value in steps of 5% if the motor stalls during run at constant speed.
■ n8-49: Heavy Load Id Current
No.
(Hex.)
Name Description
Default
(Range)
n8-49
(053C)
Heavy Load Id Current
Sets the d-axis current to that the drive will supply to the motor to run it at a constant speed with a
heavy load. Considers E5-03 [PM Motor Rated Current (FLA)] to be 100%. Usually it is not
necessary to change this setting.
Determined by E5-01
(-200.0 - +200.0%)
When you use an IPM motor, you can use the reluctance torque of the motor to make the motor more efficient and
help conserve energy.
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