Parameter Details
12
12.10 n: Special Adjustment
YASKAWA SIEPC71061705H GA700 Series Technical Manual 925
■ 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 improve torque accuracy in the motoring direction when running at low speeds, either perform only Stationary Auto-Tuning for
Line-to-Line Resistance, or increase the setting value in 5% increments. The recommended setting is 100% to 120%.
• 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.
Note:
Do rotational Auto-Tuning before you adjust n4-63, n4-64 [Speed Estimate Response@Low Freq], n4-65 [Flux Estimate
Response@High Freq], and n4-66 [Flux Estimate Response @Low Freq].
■ n4-64: Speed Estimate Response@Low Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-64
(1B84)
Speed Estimate
Response@Low Freq
Sets the responsiveness of the speed estimation in low speed ranges, where 0 ≤ the output
frequency, which 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.
Note:
Do rotational Auto-Tuning before you adjust n4-63 [Speed EstimateResponse@High Freq], n4-64, n4-65 [Flux Estimate
Response@High Freq], and n4-66 [Flux Estimate Response @Low Freq].
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