2.4 C: Tuning
212 YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
■ 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.
■ C3-23: Motor 2 Slip Compensation Limit
No.
(Hex.)
Name Description
Default
(Range)
C3-23
(0242)
Motor 2 Slip Compensation
Limit
Sets the upper limit for the slip compensation function as a percentage of the motor 2 rated slip.
200%
(0 - 250%)
If you increase the value of C3-21 [Motor 2 Slip Compensation Gain] and the motor speed is slow, use this parameter.
The drive uses this parameter when the slip is at the upper limit of slip compensation. Make sure that you measure the
motor speed when you increase this parameter value. Set this parameter to make the frequency reference and the slip
compensation limit less than the permitted range of the machine.
The slip compensation limit is constant in the constant torque range (frequency reference ≤ E3-06 [Motor 2 Base
Frequency]). In the constant power range where the frequency reference > E3-06, the slip compensation limit
increases with the C3-23 value and the output frequency as shown in Figure 2.36.
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