YASKAWA GA700 Technical Manual page 651

Note:
Confirm that the following parameters are correctly set before changing the slip compensation gain. If E3-01 = 2 [Motor 2 Control
Mode Selection = Open Loop Vector Control] is set, E4-02 [Motor 2 Rated Slip] can be set by Auto-Tuning.
• E4-01 [Motor 2 Rated Current]
• E4-02 [Motor 2 Rated Slip]
• E4-03 [Motor 2 Rated No-Load Current]
Adjustment may help in the following situations:
• If the motor speed is slower than the frequency reference, increase C3-01 by 0.1.
• If the motor at constant speed is faster than the frequency reference, decrease C3-01 by 0.1.
■
C3-22: Motor 2 Slip Comp DelayTime
No.
Name
(Hex.)
C3-22 Motor 2 Slip Comp
DelayTime
(0241)
RUN
Adjustment may help in the following situations:
• Increase this setting when speed is unstable.
• Decrease the setting when the slip compensation response is too slow.
■
C3-23: Motor 2 Slip Compensation Limit
No.
Name
(Hex.)
C3-23 Motor 2 Slip
Compensation Limit
(0242)
RUN
This parameter is used when the motor speed is low despite increasing the setting value of C3-21 [Motor 2 Slip
Compensation Gain]. The slip may have reached the upper limit of slip compensation. Adjust this parameter
while measuring the motor speed after increasing the value set to C3-23. Set this parameter so that the combined
value of the frequency reference and the slip compensation limit does not exceed the machine's allowable range.
The slip compensation limit is constant in the constant torque range (frequency reference ≤ E3-06 [Motor 2 Base
Frequency]). In the constant power range the frequency reference > E3-06 increases based on C3-23 and the
output frequency as shown in the following figure.
■
C3-24: Motor 2 Slip Comp @ Regen Select
No.
Name
(Hex.)
C3-24 Motor 2 Slip Comp
@ Regen Select
(0243)
RUN
When slip compensation during regeneration has been activated and a regenerative load is applied, it might be
necessary to use a dynamic braking option (braking resistor or braking resistor unit).
0 : Disabled
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Adjusts the slip compensation delay time for motor 2 when speed is
unstable or when the slip compensation response is too slow. Normally
there is no need to change this setting.
V/f CL-V/f OLV CLV AOLV
Sets the upper limit for the slip compensation function as a percentage of
the motor 2 rated slip.
Figure 11.49 Motor 2 Slip Compensation Limit
V/f CL-V/f OLV CLV AOLV
Enables or disables slip compensation for motor 2 during regenerative
operation.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.4 C: Tuning
Default
(Range)
Determined by E3-01
(0 - 10000 ms)
Default
(Range)
200%
(0 - 250%)
Default
(Range)
0
(0 - 2)
11
651