YASKAWA GA800 Programming Manual page 259

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C4-04: Torque Compensation @ REV Start
No.
Name
(Hex.)
C4-04 Torque Compensation @
REV Start
(0218)
The drive uses the time constant set in C4-05 [Torque Compensation Time] to do the torque compensation function.
This is available only when you start the motor with the reverse Run command.
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C4-05: Torque Compensation Time
No.
Name
(Hex.)
C4-05 Torque Compensation Time
(0219)
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C4-06: Motor 2 Torque Comp Delay Time
No.
Name
(Hex.)
C4-06 Motor 2 Torque Comp Delay
Time
(021A)
Sets the time constant used during Speed Search or during regenerative operation when ov occurs.
Adjust this parameter in the following circumstances.
• Gradually reduce the setting in 10 ms increments and check the performance to improve motor torque speed
response when ov occurs.
Note:
• Ensure that C4-06 ≥ C4-02 [Torque Compensation Delay Time].
• Increase the setting value of n2-03 [Automatic Freq Regulator Time 2] proportional to C4-06.
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C4-07: Motor 2 Torque Compensation Gain
No.
Name
(Hex.)
C4-07 Motor 2 Torque
Compensation Gain
(0341)
RUN
In V/f Control or CL-V/f Control, adjust the value in 0.05 unit increments for these conditions:
• When torque is not sufficient during low-speed operation of 10 Hz or less, increase the setting value
• When there is vibration in the motor or when the motor hunts when operating the drive with a light load, decrease
the setting value
• When you use a long motor cable, increase the setting.
Note:
• Adjust C4-07 and make sure that the output current is not more than the drive rated current during low-speed operation.
• When A1-02 = 2 [Open Loop Vector], usually it is not necessary to change this setting. If you change this parameter in that control method,
it can decrease the torque precision.
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C4-19: Torque Ripple Suppress Min Freq
No.
Name
(Hex.)
C4-19 Torque Ripple Suppress Min
Freq
(0B8D)
Expert
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
V/f CL-V/f OLV CLV AOLV
Sets the amount of torque reference for reverse start as a percentage of the motor rated torque.
V/f CL-V/f OLV CLV AOLV
Sets the starting torque constant to use with C4-03 and C4-04 [Torque Compensation @ FWD/REV
Start].
V/f CL-V/f OLV CLV AOLV
Sets the value if ov [Overvoltage] occurs with sudden changes in the load, at the end of acceleration,
or at the start of deceleration.
V/f CL-V/f OLV CLV AOLV
Sets the gain for motor 2 torque compensation function when using the Motor Switch function.
V/f CL-V/f OLV CLV AOLV
Adjust this if slow oscillation occurs at low speeds. Increase this parameter in 1.0 Hz increments
when current ripples and torque ripples occur during low-speed operation. Set this parameter to 0.0 to
disable the function if increasing the value does not fix the problem. Usually it is not necessary to
change this setting.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
2.4 C: Tuning
Default
(Range)
0.0%
(-200.0 - 0.0%)
Default
(Range)
10 ms
(0 - 200 ms)
Default
(Range)
150 ms
(0 - 10000 ms)
Default
(Range)
1.00
(0.00 - 2.50)
Default
(Range)
2
0.1 Hz
(0.0 - 10.0 Hz)
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