Parameter Details
12
12.9 n: SPECIAL
SIEPCYEUOQ2V01A Q2V Technical Manual 687
Note:
• Set n8-35 = 2 [InitRotorPos Selection = HiFreq Injection] or n8-57 = 1 [High-Freq Injection = Enabled] to enable this parameter.
• Set n8-41 > 0.0 for IPM motors.
Configure the setting as follows.
• Decrease the setting in units of 0.5 if an oscillation or hunting occurs.
• Increase the setting in units of 0.5 if tracking related to load changes is required.
■ n8-42: HFI PoleDet iTime
No.
(Hex.)
Name Description
Default
(Range)
n8-42
(0569)
Expert
HFI PoleDet iTime
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 = 2 [InitRotorPos Selection = HiFreq Injection] or n8-57 = 1 [High-Freq Injection = Enabled] to enable this parameter.
■ n8-45: SpdFbck Det.Gain
No.
(Hex.)
Name Description
Default
(Range)
n8-45
(0538)
SpdFbck Det.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 Comp.Time Constant
No.
(Hex.)
Name Description
Default
(Range)
n8-47
(053A)
Pull-In Comp.Time
Constant
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 Current (for PM Motors)
No.
(Hex.)
Name Description
Default
(Range)
n8-48
(053B)
RUN
Pull-In Current (for PM
Motors)
On the basis that parameter E5-03 [PM Mot 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.
• Slightly reduce this value if there is too much current when driving a light load at a constant speed.
• Increase the setting value in steps of 5% when hunting or vibration occurs during run at constant speed.
• Increase the setting value in steps of 5% if the motor stalls during run at constant speed.
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