8400 BaseLine D | Software Manual
Motor control (MCTRL)
Selection of the operating mode
80 L Firmware 03.00 - DMS EN 5.0 - 07/2009
5.1.1.2 Optimisation of the operational performance by means of slip compensation
Under load, the speed of an asynchronous machine decreases. This load-dependent speed
drop is called slip.
The slip can be compensated by setting C021
accordingly.
The slip compensation can be set automatically by entering the value calculated during
the motor parameter identification into code C021
.
The setting must be made manually when the motor parameter identification cannot
be called up.
How to enter the slip compensation automatically:
1. Prepare the motor parameter identification by setting the following data taken
from the motor nameplate:
• Rated motor power C081
• Rated motor speed C087
• Rated motor current C088
• Rated motor frequency C089
• Rated motor voltage C090
•Motor cos ϕ C091
2. Carry out the motor parameter identification
Automatic motor parameter identification
( 90)
Note!
The slip compensation C021 is active in the V/f characteristic control mode and
in the vector control mode (C6
= 4, 6, 8).
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