12.4 C: Tuning
554 YASKAWA SIEPC71061753C GA500 Technical Manual
• Motor rated voltage is high
Do not enable this parameter in these conditions:
• Operating a motor in the middle speed range or low speed range
• Power supply voltage is a minimum of 10% more than the motor rated voltage
When you enable this parameter, if the power supply voltage is much less than the motor rated voltage, torque
control will not be accurate.
0 : Disabled
1 : Enabled
■ C3-16: Vout Modulation Limit Start Lvl
No.
(Hex.)
Name Description
Default
(Range)
C3-16
(0261)
Expert
Vout Modulation Limit
Start Lvl
Sets the modulation factor that starts the output voltage limit operation when C3-05 = 1 [Output
Voltage Limit Selection = Enabled].
90.0%
(70.0 - 90.0%)
■ C3-17: Vout Modulation Limit Max Level
No.
(Hex.)
Name Description
Default
(Range)
C3-17
(0262)
Expert
Vout Modulation Limit Max
Level
Sets the modulation factor used with C3-18 [Output Voltage Limit Level] for the output voltage
limit operation when C3-05 = 1 [Output Voltage Limit Selection = Enabled].
100.0%
(85.0 - 100.0%)
■ C3-18: Output Voltage Limit Level
No.
(Hex.)
Name Description
Default
(Range)
C3-18
(0263)
Expert
Output Voltage Limit Level
Sets the maximum drop width of the voltage reference when C3-05 = 1 [Output Voltage Limit
Selection = Enabled].
90.0%
(50.0 - 100.0%)
■ C3-21: Motor 2 Slip Compensation Gain
No.
(Hex.)
Name Description
Default
(Range)
C3-21
(033E)
RUN
Motor 2 Slip Compensation
Gain
Sets the gain for the motor 2 slip compensation function. Usually it is not necessary to change this
setting.
Determined by E3-01
(0.0 - 2.5)
Note:
Correctly set these parameters before you change the slip compensation gain:
• E4-01 [Motor 2 Rated Current]
• E4-02 [Motor 2 Rated Slip]
• E4-03 [Motor 2 Rated No-Load Current]
Adjust this parameter as follows if necessary:
• If the motor speed is slower than the frequency reference, increase C3-01 in 0.1-unit increments.
• If the motor speed is faster than the frequency reference, decrease C3-01 in 0.1-unit increments.
■ C3-22: Motor 2 Slip Comp Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C3-22
(0241)
RUN
Motor 2 Slip Comp Delay
Time
Sets the slip compensation delay time for motor 2 when speed is unstable or when the slip
compensation response is too slow. Usually it is not necessary to change this setting.
Determined by E3-01
(0 - 10000 ms)
Use these settings to adjust this parameter as necessary:
• When the speed is not stable, increase the setting.
• When the slip compensation response is too slow, decrease the setting.
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