Parameter Details
12
12.3 C: TUNING
SIEPCYEUOQ2V01A Q2V Technical Manual 499
The drive uses the time constant set in C4-05 [Trq Comp Time] to do the torque compensation function.
This is available only when you start the motor with the reverse Run command.
■ C4-05: Trq Comp Time
No.
(Hex.)
Name Description
Default
(Range)
C4-05
(0219)
Trq Comp Time
Sets the starting torque constant to use with C4-03 and C4-04 [Trq Comp@FWD Start and Trq
Comp@REV Start].
10 ms
(0 - 200 ms)
■ C4-06: M2 Trq Comp Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C4-06
(021A)
M2 Trq 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 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 [Trq Comp Delay Time].
• Increase the setting value of n2-03 [AFR Time 2] proportional to C4-06.
■ C4-07: M2 Trq Comp Gain
No.
(Hex.)
Name Description
Default
(Range)
C4-07
(0341)
RUN
M2 Trq Comp 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, 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 value.
Note:
• Adjust C4-07 to make sure that the output current is not more than the drive rated current during low-speed operation.
• When A1-02 = 2 [Control Method = OLVector], usually it is not necessary to change the setting. Torque accuracy will decrease.
■ C4-23: Current Ctrl Gain
No.
(Hex.)
Name Description
Default
(Range)
C4-23
(1583)
RUN
Expert
Current Ctrl Gain
Current control gain. Usually it is not necessary to change this parameter.
1.00
(0.50 - 2.50)
◆ C5: ASR - SPEED REGULATION
The ASR adjusts the torque reference to decrease the difference between frequency reference and motor speed.
A1-02 [Control Method] Targets of Adjustment
• 6: PM AOLVector
• 8: EZ Vector
Torque Reference
Figure 12.44 is a speed control block diagram of each control method.
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