Parameter Details
12
12.9 n: SPECIAL
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 817
■ n7-01 LoFreq Damping Gain
No.
(Hex.)
Name Description
Default
(Range)
n7-01
(3111)
Expert
LoFreq Damping Gain
Sets the oscillation suppression gain for the low speed range.
1.0
(0.1 - 10.0)
Note:
• If oscillation occurs in the low speed range, increase the acceleration time or increase the setting value in 0.5-unit increments.
• To get starting torque with the setting for C4-01 [Trq Comp Gain], decrease the setting value in 0.3-unit increments.
■ n7-05 TrqCtrl Response Gain
No.
(Hex.)
Name Description
Default
(Range)
n7-05
(3115)
Expert
TrqCtrl Response Gain
Sets the response gain related to changes in the load.
1.00
(0.10 - 10.00)
Note:
To make tracking related to load changes better, increase the setting value in 5-unit increments. If oscillation occurs during load
changes, decrease the setting value in 5-unit increments.
■ n7-07 Speed Calc.Gain1
No.
(Hex.)
Name Description
Default
(Range)
n7-07
(3117)
Expert
Speed Calc.Gain1
Sets the speed calculation gain during usual operation.
15.0 Hz
(1.0 - 50.0 Hz)
■ n7-08 Speed Calc.Gain2
No.
(Hex.)
Name Description
Default
(Range)
n7-08
(3118)
Expert
Speed Calc.Gain2
Sets the speed calculation gain during a speed search.
25.0 Hz
(1.0 - 50.0 Hz)
Note:
When you increase the setting value, you can do a speed search of a motor rotating at a high frequency. If the setting value is too high,
the calculated speed will oscillate and a restart will fail. Decrease the setting value in these conditions.
■ n7-10 Pull-in SwitchSpeed
No.
(Hex.)
Name Description
Default
(Range)
n7-10
(311A)
Expert
Pull-in SwitchSpeed
Sets a speed range proportional to the rated frequency that enables pull-in current commands.
Drive rated frequency = 100% value. If there is a large quantity of oscillation when you operate in
the low speed range, increase the setting value.
10.0%
(0.0 - 100.0%)
Note:
• When the drive accelerates, it enables these settings:
–Motor speed ≤ n7-10 + n7-11 [DrvModeSwitchHysteresis Band]: n8-51 [Ac/Dec Pull-In Current]
–Motor speed > n7-10 + n7-11: b8-01 [eSave Ctrl Selection]
• When the drive decelerates, it enables these settings:
–Motor speed ≤ n7-10: n8-51 [Ac/Dec Pull-In Current]
–Motor speed > n7-10: b8-01 [eSave Ctrl Selection]
• If there is a large quantity of oscillation when you operate in the low speed range, increase the setting value.
• When it is most important to save energy in the low speed range, decrease the setting value.
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