Identifying The Motor Data And Optimizing The Closed-Loop Control - Siemens SINAMICS G120 Operating Instructions Manual
Low voltage converters
chassis devices with cu240b-2 and cu240e-2
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- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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5.4.7
Identifying the motor data and optimizing the closed-loop control
The inverter has several techniques to automatically identify the motor data and optimize the
speed control.
To start the motor data identification routine, you must switch-on the motor via the terminal
strip, fieldbus or from the operator panel.
Risk of death due to machine motion while motor data identification is active
For the stationary measurement, the motor can make several rotations. The rotating
measurement accelerates the motor up to its rated speed. Secure dangerous machine parts
before starting motor data identification:
● Before switching on, ensure that nobody is working on the machine or located within its
● Secure the machine's work area against unintended access.
● Lower hanging/suspended loads to the floor.
Preconditions
● You selected a method of motor data identification during quick commissioning, e.g.
measuring motor data while the motor is stationary.
When quick commissioning is complete, the inverter issues alarm A07991.
● The motor has cooled down to the ambient temperature.
An excessively high motor temperature falsifies the motor data identification results.
Procedure when using the BOP-2 operator panel
To start the motor data identification, proceed as follows:
Press the HAND/AUTO key.
The BOP-2 displays the symbol indicating manual operation.
Switch on the motor.
During motor data identification, "MOT-ID" flashes on the BOP‑2.
If the inverter again outputs alarm A07991, then it waits for a new ON command to start the
rotating measurement.
If the inverter does not output alarm A07991, switch off the motor as described below, and
switch over the inverter control from HAND to AUTO.
Switch on the motor to start the rotating measurement.
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
WARNING
working area.
5.4 Quick commissioning using the BOP-2 operator panel
Commissioning
147
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