YASKAWA CIPR-GA50C series Technical Manual page 529

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C3-23: Motor 2 Slip Compensation Limit
No.
Name
(Hex.)
C3-23 Motor 2 Slip Compensation
Limit
(0242)
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
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C3-24: Motor 2 Slip Comp during Regen
No.
Name
(Hex.)
C3-24 Motor 2 Slip Comp during
Regen
(0243)
If you enable the slip compensation function during regeneration, the quantity of regeneration can increase
immediately. In this condition, it is necessary to use a dynamic braking option (braking resistor or braking resistor
unit).
0 : Disabled
The drive will not do Slip compensation during regeneration.
The load and operation status (regenerative operation) can cause the motor speed to be higher or lower than the
frequency reference.
1 : Enabled Above 6Hz
The slip compensation function is enabled during regeneration. Slip compensation is disabled at output
frequencies of 6 Hz or less.
2 : Enabled Above C3-15
The drive uses E2-02 [Motor Rated Slip] to automatically calculate the frequency range where it will disable slip
compensation function during regeneration.
Slip compensation is enabled at frequencies as low as 2 Hz.
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C3-29: Slip Compensation Gain @ Low Spd
No.
Name
(Hex.)
C3-29 Slip Compensation Gain @
Low Spd
(1B5D)
Expert
Adjust this parameter as follows if necessary:
• If the motor speed is slower than the frequency reference, increase the setting value in 0.1 unit increments.
• If the motor speed is faster than the frequency reference, decrease the setting value in 0.1 unit increments.
YASKAWA SIEPC71061753A GA500 Technical Manual
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the upper limit for the slip compensation function as a percentage of the motor 2 rated slip.
Figure 12.43 Motor 2 Slip Compensation Limit
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the slip compensation during regenerative operation function for motor 2.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the gain for the slip compensation function in the low speed range. Usually it is not necessary
to change this setting.
Description
Figure 12.43.
Description
Description
12.4 C: Tuning
Default
(Range)
200%
(0 - 250%)
Default
(Range)
0
(0 - 2)
Default
(Range)
0.0
(0.0 - 2.5)
12
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