11.4 C: Tuning
610 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
■ C4-02: Torque Compensation Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C4-02
(0216)
RUN
Torque Compensation
Delay Time
Sets the torque compensation delay time. Usually it is not necessary to change this setting.
Determined by A1-02
(0 - 60000 ms)
Set this parameter in these conditions:
• If there is vibration in the motor, increase the setting.
• If the motor speed or motor torque response is too slow, decrease the setting.
■ C4-06: Motor 2 Torque Comp Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C4-06
(021A)
Motor 2 Torque Comp
Delay Time
Sets the value if ov [Overvoltage] occurs with sudden changes in the load, at the end of
acceleration, or at the start of deceleration.
150 ms
(0 - 10000 ms)
Sets the time constant when ov occurs during regenerative operation.
Gradually increase 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.
■ C4-07: Motor 2 Torque Compensation Gain
No.
(Hex.)
Name Description
Default
(Range)
C4-07
(0341)
RUN
Motor 2 Torque
Compensation Gain
Sets the gain for motor 2 torque compensation function when using the Motor Switch function.
1.00
(0.00 - 2.50)
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.
■ C4-08: M2 Torque Comp Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C4-08
(1110)
RUN
M2 Torque Comp Delay
Time
Sets the primary delay time for motor 2 torque compensation.
Determined by E3-01
(0 - 60000 ms)
■ C4-13: Torque Comp Delay Time Select 1
No.
(Hex.)
Name Description
Default
(Range)
C4-13
(1115)
RUN
Torque Comp Delay Time
Select 1
Sets the primary delay time constant for torque compensation when the drive receives a Reverse
run command and b1-23 = 1 [Selection REV Parameters = Enabled].
Determined by A1-02
(0 - 60000 ms)
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