YASKAWA LA500 - Page 294

12.3 C: Tuning
294 YASKAWA SIEPYEULA5001C LA500 Technical Manual
Note:
Set the motor parameters and V/f pattern properly before setting C4 parameters.
■ C4-01: Torque Compensation Gain
No.
(Hex.)
Name Description
Default
(Range)
C4-01
(0215)
RUN
Torque Compensation Gain
Sets the gain for the torque compensation function.
1.00
(0.00 - 2.50)
For these control methods and states, adjust the setting value.
A1-02 [Control Method Selection] Status Adjustment
0 [V/f Control]
2 [Open Loop Vector]
Torque is not sufficient during low-speed operation of 10 Hz or less.
Increase the setting in 0.05-unit increments.
There is vibration in the motor or the motor hunts when operating the
drive with a light load.
Decrease the setting in 0.05-unit decrements.
The cable length between the drive and motor is too long.
Increase the setting in 0.05-unit increments.
Note:
• Adjust C4-01 to make sure that output current is not more than the drive rated current while the drive operates at low speed.
• When A1-02 = 2 [Open Loop Vector], do not change this parameter under normal conditions. Torque accuracy will decrease.
■ 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.
■ C4-03: Torque Compensation @ FWD Start
No.
(Hex.)
Name Description
Default
(Range)
C4-03
(0217)
Expert
Torque Compensation @
FWD Start
Set the amount of torque reference for forward start as a percentage of the motor rated torque.
0.0%
(0.0 - 200.0%)
The torque compensation function is performed using the time constant set in C4-05 [Torque Compensation
Time].
This is available only when you start the motor with the forward Up/Down command. Set this parameter to 0.0 to
disable this function.
■ C4-04: Torque Compensation @ REV Start
No.
(Hex.)
Name Description
Default
(Range)
C4-04
(0218)
Expert
Torque Compensation @
REV Start
Sets the amount of torque reference for reverse start as a percentage of the motor rated torque.
0.0%
(-200.0 - 0.0%)
The torque compensation function is performed using the time constant set in C4-05 [Torque Compensation
Time].
This is available only when you start the motor with the reverse Up/Down command. Set this parameter to 0.0 to
disable this function.
V/f
OLV
V/f
OLV
V/f
OLV
V/f
OLV