2.3 C: Tuning
YASKAWA ELECTRIC
TOEP C710687 03B FSDrive-MV1000 Parameter Guide
135
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C4-02: Torque Compensation Primary Delay Time 1
Sets the delay time used for applying torque compensation.
Adjustment
Although C4-02 rarely needs to be changed, adjustments may help in the following situations:
• Increase this setting if the motor vibrates.
• Decrease this setting if the motor responds too slowly to changes in the load.
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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.
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C4-04: Torque Compensation at Reverse Start (OLV)
Sets the amount of torque reference at start in the reverse direction in order to improve motor performance during start
with heavy load. Compensation is applied using the Torque Compensation Time 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.
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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 in C4-03 and C4-04.
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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.
Note:
If C4-06 is set to a relatively large value, be sure to also 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.
Sets the gain for the torque compensation function of the motor 2.
No.
<1>
Refer to Control Mode Dependent Parameter Default Values on page 84
for details on default settings.
Name
Setting Range
Default
C4-02
Torque Compensation Primary Delay Time 1
0 to 60000 ms
Determined by A1-02 and o2-04
No.
Name
Setting Range
Default
C4-03
Torque Compensation at Forward Start
0.0 to 200.0%
0.0%
No.
Name
Setting Range
Default
C4-04
Torque Compensation at Reverse Start
-200.0 to 0.0%
0.0%
No.
Name
Setting Range
Default
C4-05
Torque Compensation Time Constant
0 to 200 ms
10 ms
No.
Name
Setting Range
Default
C4-06
Torque Compensation Primary Delay Time 2
0 to 10000 ms
150 ms
No.
Name
Setting Range
Default
C4-07
<1> Refer to
Control Mode Dependent Parameter Default Values on page 84
for details on default settings.
Motor 2 Torque Compensation Gain
0.00 to 2.50
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