Contents

•Related Parameters
Parameter
No.
Name
Factory
Setting
Change
during
Operation
V/f
Control Methods
Open
Loop
Vector
Closed
Loop
Vector
C4-01 Torque compensation gain 1.00 Yes A A No
C4-02 Torque compensation delay time constant 2000 ms No A A No
C4-03 Starting torque compensation value (forward direction) 0.0 No No A No
C4-04 Starting torque compensation value (reverse direction) 0.0 No No A No
C4-05 Starting torque compensation time constant 1 ms No No A No
•Adjusting Torque Compensation Gain (C4-01)
Normally, there is no need to change this setting. If adjustments are necessary do the following:
Open Loop Vector control
• If the torque response is slow increase the setting value.
• If vibrations occur decrease the setting value.
V/f control
• If the cable is very long, increase the set value.
• If the motor capacity is smaller than the Inverter capacity (max. applicable motor capacity), increase the
set value.
• If the motor is vibrating, reduce the set value.
Setting precautions
• Adjust this parameter so that the output current during low-speed rotation does not exceed the Inverter
rated output current range.
• Adjust the value in steps of 0.05 only.
•Adjusting the Torque Compensation Delay Time Constant (C4-02)
The factory setting depends on the control mode. The factory settings are:
• V/f control: 200 ms
• Open loop vector control: 20 ms
Normally, there is no need to change this setting. If adjustments are necessary do the following:
• If the motor is vibrating or if overshooting occurs, increase the set value.
• If the torque response is slow, decrease the set value.
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