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C4-03: Torque Compensation at Forward Start (OLV)
Sets the amount of torque at start in the forward direction to improve motor performance during start with a heavy load.
Compensation is applied using the time constant set in parameter C4-05. Enable this function when the load pulls the motor
in reverse when starting with a Forward run command. Setting 0.0% disables this feature.
No. Parameter Name Setting Range Default
C4-03 Torque Compensation at Forward Start 0.0 to 200.0% 0.0%
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C4-04: Torque Compensation at Reverse Start (OLV)
Sets the amount of torque reference at start in the reverse direction to improve motor performance during start with heavy
load. Compensation is applied using the time constant set in parameter C4-05. Enable this function if the load pulls the motor
in the forward direction when starting with a Reverse run command. Setting 0.0% disables this feature.
No. Parameter Name Setting Range Default
C4-04 Torque Compensation at Reverse Start -200.0 to 0.0% 0.0%
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C4-05: Torque Compensation Time Constant (OLV)
Sets the time constant for applying the torque compensation at start that is set to C4-03 and C4-04.
No. Parameter Name Setting Range Default
C4-05 Torque Compensation Time Constant 0 to 200 ms 10 ms
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C4-06: Torque Compensation Primary Delay Time 2 (OLV)
Sets the time constant used during Speed Search or during regenerative operation. Adjust the value if an overvoltage fault
occurs with sudden changes in the load or at the end of acceleration with high inertia load.
No. Parameter Name Setting Range Default
C4-06 Torque Compensation Primary Delay Time 2 0 to 10000 ms 150 ms
Note: If C4-06 is set to a relatively large value, increase the setting in n2-03 (AFR Time Constant 2) proportionally.
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C4-07: Motor 2 Torque Compensation Gain
Functions for motor 2 the same way that C4-01 functions for motor 1.
Refer to C3-01: Slip Compensation Gain on page 156 for details on adjusting this parameter.
No. Parameter Name Setting Range Default
C4-07 Motor 2 Torque Compensation Gain 0.00 to 2.50 1.00
5.3 C: Tuning
160
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
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