Parameter Details
12
12.3 C: TUNING
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual 571
• If the motor at constant speed is faster than the frequency reference, decrease this parameter by 0.1.
■ C3-02 Slip Comp Delay Time
No.
(Hex.)
Name Description
Default
(Range)
C3-02
(0210)
RUN
Slip Comp Delay Time
Sets the slip compensation delay time when speed is unstable or when the slip compensation
response is too slow. Usually it is not necessary to change this setting.
Determined by A1-02
(0 - 10000 ms)
It can be necessary to adjust the parameter in these conditions:
• If the speed is not stable, increase this parameter.
• If the slip compensation response is too slow, decrease the setting.
■ C3-03 Slip Comp Limit
No.
(Hex.)
Name Description
Default
(Range)
C3-03
(0211)
Slip Comp Limit
Sets the upper limit for the slip compensation function as a percentage of the motor rated slip.
200%
(0 - 250%)
If you increase the value of C3-01 [Slip Comp 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 ≤ E1-06 [Base
Frequency]). In the constant power range, the frequency reference > E1-06 increases with the C3-03 value and the
output frequency as shown in Figure 12.45.
Figure 12.45 Slip Compensation Limit
■ C3-04 Slip Comp@Regen
No.
(Hex.)
Name Description
Default
(Range)
C3-04
(0212)
Slip Comp@Regen
Sets the slip compensation function during regenerative operation.
0
(0 - 2)
If you apply a regenerative load when slip compensation during regeneration is active, it can be necessary to use a
dynamic braking option (braking resistor or braking resistor unit).
0 : Disabled
The drive does not provide slip compensation.
The load and operation status (regenerative operation) can cause the motor speed to be higher or lower than the
frequency reference.
1 : Enable>6 Hz
Slip compensation function is enabled during regenerative operation. Slip compensation is disabled at output
frequencies of 6 Hz or less.
2 : Enable>C3-15
The drive uses E2-02 [Mot Rated Slip] to automatically calculate the frequency range where it will disable slip
compensation function during regenerative operation.
Slip compensation is enabled at frequencies as low as 2 Hz.
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