Parameter Details
12
12.10 n: Special Adjustment
YASKAWA SIEPC71061753C GA500 Technical Manual 749
■ n8-41: HFI P Gain
No.
(Hex.)
Name Description
Default
(Range)
n8-41
(0568)
Expert
HFI P Gain
Sets the response gain for the high frequency injection speed estimation.
2.5
(-10.0 - +10.0)
Note:
• Set n8-35 = 1 [Initial Pole Detection Method = High Frequency Injection] or n8-57 = 1 [HFI Overlap Selection = Enabled] to enable
this parameter.
• When A1-02= 6 [Control Method Selection = AOLV/PM] and you do High Frequency Injection Auto-Tuning, the drive automatically
sets this parameter .
• Set n8-41 > 0.0 for IPM motors.
Set this parameter as follows.
• If there is oscillation or hunting, decrease the setting in units of 0.5.
• When it is necessary to track load changes, increase the setting in units of 0.5.
■ n8-42: HFI I Time
No.
(Hex.)
Name Description
Default
(Range)
n8-42
(0569)
Expert
HFI I Time
Sets the integral time constant for the high frequency injection speed estimation. Usually it is not
necessary to change this setting.
0.10 s
(0.00 - 9.99 s)
Note:
Set n8-35 = 1 [Initial Pole Detection Method = High Frequency Injection] or n8-57 = 1 [HFI Overlap Selection = Enabled] to enable
this parameter.
■ 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.
■ n8-47: 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)
RUN
Pull-in/Light Load Id
Current
On the basis that parameter E5-03 [Motor Rated Current (FLA)] is the 100% value, this
parameter sets the d-axis current that flows to the motor during run at constant speed as a
percentage.
30%
(0 - 200%)
Adjust in the following situations.
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