Identifying The Motor Data And Optimizing The Closed-Loop Control - Siemens SINAMICS G120C Operating Instructions Manual

5.4.7

Identifying the motor data and optimizing the closed-loop control

Overview
Using the motor data identification, the converter measures the data of the stationary motor. In
addition, based on the response of the rotating motor, the converter can determine a suitable
setting for the vector control.
To start the motor data identification routine, you must switch-on the motor via the terminal
strip, fieldbus or from the operator panel.
Identifying the motor data and optimizing the closed-loop control
Requirements
• You have 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 converter issues alarm A07991.
• The motor has cooled down to the ambient temperature.
An excessively high motor temperature falsifies the motor data identification results.
Unexpected machine motion while the motor data identification is in progress
For the stationary measurement, the motor can make several rotations. The rotating
measurement accelerates the motor up to the 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 suspended loads to the floor.
Procedure
Enable the control priority via the operator panel.
The BOP-2 displays the symbol indicating manual operation.
Switch on the motor.
During motor data identification
If the converter again outputs alarm A07991, then it waits for a new ON command to start
the rotating measurement.
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
WARNING
working area.
5.4 Quick commissioning using the BOP-2 operator panel
flashes on the BOP‑2.
Commissioning
137