12.10 n: Special Adjustment
1030 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
• If torque and speed response are unsatisfactory, gradually increase the setting from 0.
• If the motor does not run smoothly, gradually increase the setting from 0.
• If the motor stalls during run at constant speed, gradually increase the setting from 0.
• If there is vibration or hunting, decrease the setting.
Note:
• If the value too low, the drive will detect STPo [Motor Step-Out Detected].
• If you use one motor or more than motor at low inertia and the value is too high, there can be vibration in the motor.
0 : Below 1:10
Use this setting in these conditions:
• The ratio between the motor inertia and machine inertia is less than 1:10
• There are large current ripples
1 : Between 1:10 and 1:30
Use this setting in these conditions:
• The ratio between the motor inertia and machine inertia is approximately 1:10 to 1:30
• Parameter n8-55 = 0 and the drive detects STPo because of an impact load or sudden acceleration/deceleration.
2 : Between 1:30 and 1:50
Use this setting in these conditions:
• The ratio between the motor inertia and machine inertia is approximately 1:30 to 1:50
• Parameter n8-55 = 1 and the drive detects STPo because of an impact load or sudden acceleration/deceleration.
3 : Beyond 1:50
Adjust this parameter in these conditions:
• The ratio between the motor inertia and machine inertia is more than 1:50
• Parameter n8-55 = 2 and the drive detects STPo because of an impact load or sudden acceleration/deceleration.
■ n8-56: PM High Performance Selection
No.
(Hex.)
Name Description
Default
(Range)
n8-56
(056F)
Expert
PM High Performance
Selection
Usually it is not necessary to change this setting. Sets the high efficiency control method for IPM
motor.
1
(0 - 2)
0 : Disabled
1 : Enabled (Vd)
2 : Enabled (Vd & Vq)
■ n8-57: HFI Overlap Selection
No.
(Hex.)
Name Description
Default
(Range)
n8-57
(0574)
HFI Overlap Selection
Sets the function that detects motor speed with high frequency injection.
0
(0, 1)
Note:
• When you set n8-57 = 1, do High Frequency Injection Auto-Tuning.
• When there is high frequency injection, the motor will make an excitation sound.
• When you use Zero Speed Control, set E1-09 = 0.0 [Minimum Output Frequency = 0.0 Hz].
0 : Disabled
Use this setting with SPM motors. The speed control range is approximately 1:20.
When n8-57 = 0, you cannot set E1-09 [Minimum Output Frequency] ≤ 1/20 of the value of E1-06 [Base Frequency].
1 : Enabled
The speed control range is 1:100. It gives sufficient speed detection at low speeds.
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