Siemens SINAMICS G120C Operating Instructions Manual page 103

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
● In the basic commissioning, you have selected a motor data identification method, e.g.
measuring the motor data at standstill
After basic commissioning has been completed, the inverter outputs alarm A07991.
● The motor has cooled down to the ambient temperature.
An excessively high motor temperature falsifies the motor data identification results.
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
WARNING
working area.
This is symbol in the BOP-2 indicates an active alarm.
5.3 Commissioning using a BOP-2 operator panel
Commissioning
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