Parameter Details
2
2.10 n: Special Adjustment
YASKAWA TOEPYAIGA8002B GA800 Drive Programming 491
1 : Enabled Only when Rotating FWD
2 : Enabled Only when Rotating REV
Note:
When n3-23 = 1, 2, the drive enables overexcitation only in the direction of motor rotation in which a regenerative load is applied. Increased
motor loss can decrease ov [Overvoltage] faults.
◆ n4: Adv Open Loop Vector Tune
The following explains how to make special adjustments for Advanced Open Loop Vector [A1-02 = 4].
• First, perform Rotational Auto-Tuning.
• Operation that fluctuates around zero speed cannot be carried out when there is a load. For applications of this sort,
set A1-02 = 3 [Open Loop Vector].
• The tolerance of regenerative torque at low speeds is diminished. If regenerative torque is required in the low speed
range, set A1-02 = 3.
• This cannot be used for elevators or similar applications. There is a risk that the load could slip.
■ n4-60: Motoring Low Speed Comp Gain
No.
(Hex.)
Name Description
Default
(Range)
n4-60
(1B80)
Motoring Low Speed Comp
Gain
Sets a compensation gain to improve the control qualities for motoring loads in the low speed range.
100.0%
(50.0 - 200.0%)
Note:
• To increase the torque precision in the motoring direction when you operate at low speeds, do Stationary Auto-Tuning for Line-to-Line
Resistance only, or increase the value of this parameter in 5% increments.
• If the output frequency changes when you operate at low speeds, do Stationary Auto-Tuning for Line-to-Line Resistance only. If it is not
better, increase this parameter in 10% increments. The recommended setting is 50% to 100%.
■ n4-61: Low Speed Comp Frequency Level
No.
(Hex.)
Name Description
Default
(Range)
n4-61
(1B81)
Low Speed Comp Frequency
Level
Sets a frequency at which the settings n4-60 [Motoring Low Speed Comp Gain] and n4-62 [Regen
Low Speed Comp Gain] are enabled. When the output frequency < n4-61, the drive adjusts the torque
to agree with the settings for n4-60 and n4-62. Usually it is not necessary to change this setting.
6.00 Hz
(0.50 - 12.00 Hz)
■ n4-62: Regen Low Speed Comp Gain
No.
(Hex.)
Name Description
Default
(Range)
n4-62
(1B82)
Regen Low Speed Comp
Gain
Sets a compensation gain to improve the control qualities for regenerative loads in the low speed
range.
100.0
(50.0 - 500.0)
Note:
If you do not apply a regenerative load when you operate at low speeds, do stationary Auto-Tuning for Line-to-Line Resistance only. If this
does not make it better, increase the setting value in 5% increments. The recommended setting is 100% to 150%. If you set this parameter too
high, the drive will detect CF [Control Fault] at stop.
■ n4-63: Speed EstimateResponse@High Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-63
(1B83)
Speed
EstimateResponse@High
Freq
Sets the responsiveness of the speed estimation in high speed ranges, where the output frequency is ≥
n4-67 [Estimate Gain Switchover Freq].
60.0
(0.1 - 300.0)
If better response of speed estimation is necessary, or if the motor oscillates, or if there is a large quantity of torque
ripple, increase the setting value in 10.0 unit increments. If this does not make it better, decrease the setting value in
10.0 unit increments.
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