Omron SYSDRIVE 3G3JV

6-12
6-6 Slip Compensation Function
The slip compensation function calculates the motor torque according to the output cur-
rent, and sets gain to compensate for output frequency.
This function is used to improve speed accuracy when operating with a load.
n64
Motor Rated Slip Changes during
operation
Yes
Setting
range
0.0 to 20.0 (Hz) Unit of
setting
0.1 Hz Default setting (see note)
Note The default setting varies with the capacity of the Inverter model.
Set Values
• Set the rated slip value of the motor in use.
• This parameter is used as a slip compensation constant.
• Calculate the rated motor slip value from the rated frequency (Hz) and rpm on the motor nameplate by
using the following formula.
Rated slit value (Hz) + Rated frequency (Hz) –
Rated rpm Number of poles
120
n65
Motor No-load Current Changes during
operation
No
Setting
range
0 to 99 (%) Unit of
setting
1% Default setting (see note)
Note The default setting varies with the capacity of the Inverter model.
Set Values
• Set the motor current with no load in percentage based on the rated motor current as 100%.
• Contact the motor manufacturer for the motor current with no load.
• This parameter is used as a slip compensation constant.
n66
Slip Compensation Gain Changes during
operation
Yes
Setting
range
0.0 to 2.5 Unit of
setting
0.1 Default setting 0.0
(see note)
Note This parameter is disabled with the value set to 0.0.
Set Values
• Set the parameter to 1.0 first and check the operation of the Inverter. Then fine-tune the gain with
0.1-gain increments or decrements.
If the speed is lower than the target value, increase the set value.
If the speed is higher than the target value, decrease the set value.
n67
Slip Compensation Time Constant Changes during
operation
No
Setting
range
0.0 to 25.5 (s) Unit of
setting
0.1 s Default setting 2.0
Advanced Operation Chapter 6