Operating instructions

Commissioning (software)
2.7 Commissioning modes
Control Units CU240S
Operating Instructions (Compact), 04/2006, A5E00766042B AA
2-27

3 3  3 3
L
w

>@
3
3

3
3
˓>@
U
>$@L
>@L

w

w
Figure 2-8 Magnetizing characteristic
After selecting the motor data identification using parameter P1910, alarm A0541 is
immediately generated. The motor identification routine is started by the ON command and
different excitation signals are impressed in the motor (DC and AC voltages). This
measurement is carried-out with the motor at a standstill and it takes, including the data
calculation per selection (P1910 = 1 or 3), between 20 seconds and 4 minutes to complete.
The identification time depends on the motor and increases with its size (this takes approx.
4 min. for a 200 kW motor).
The motor data identification routine must be carried-out with the motor in the cold condition
so that the motor resistance values saved can be assigned to the parameter of the ambient
temperature P0625. Only then is the correct temperature adaptation of the resistances
possible during operation.
The motor data identification routine operates with the results of the "Complete
parameterization" P0340 = 1 or the motor equivalent diagram data which was last saved.
The results become increasingly better the more times that the identification routine is
executed (up to 3 times).
Warning
It is not permissible to carry-out the motor identification routine for loads which are potentially
hazardous (e.g. suspended loads for crane applications). Before starting the motor data
identification routine, the potentially hazardous load must be secured (e.g. by lowering the
load to the floor or clamping the load using the motor holding brake).
When starting the motor data identification routine, the rotor can move into a preferred
position. This is more significant for larger motors.