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5.5.5 Slip compensation
• Slip compensation function improves speed control accuracy when the
motor is operating with a load by calculating the motor torque
according to the output current.
5.5.5.1 Setting the slip compensation gain : S4.01
Parameter
Name
Unit
No.
Slip
S4.01
Compensation
1%
Gain
5.5.5.2 Setting the slip compensation delay : S4.02
Parameter
Name
Unit
No.
Slip
S4.02
Compensation
1msec
Delay Time
• Normally S4.02 does not need to be adjusted.
• Lower the value in S4.02 if the response time of slip compensation is
too slow.
5.5.5.3 Slip compensation limit : S4.03
Parameter
Name
Unit
No.
Slip
S4.03
Compensation
1%
Limit
• The setting unit of S4.03 is the percentage of motor rated slip(C2.05).
• Raise the slip compensation limit in S4.03 if the speed is lower than the
target value and no changes takes place even after the adjustment of
slip compensation gain.
5. Parameters
5-27
Changeable
Setting
Factory
during
range
Setting
operation
0
0
O
~S4.03
Changeable
Setting
Factory
during
range
Setting
operation
0~9999
200
X
Changeable
Setting
Factory
during
range
Setting
operation
0
200
X
~250
MOSCON-E7 User's Manual
5-28
Slip Compensation Limit
C 0.02
S 4.03
X
C 0.04
Actual limit
C 0.04 : Base Frequency
C 0.02 : Max. Output Frequency
Figure 5.11 Slip compensation limit
• Sum of the reference frequency and the slip compensation limit
does not exceed the speed capacity of the system.
• Raise the value in S4.02 if speed control characteristics are unstable.
Output
Frequency
C 0.04
C 0.02
NOTE
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