Siemens SINAMICS S120, Function Manual

Page: 249 / 1094

Vector control
5.13 Motor data identification and rotating measurement
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
249
5.13 Motor data identification and rotating measurement
5.13.1 Overview
There are two motor data identification options which are based on each other:
● Motor data identification (Page 251) with p1910 (standstill measurement)
For measurement of the motor equivalent circuit diagram parameters (obligatory for
operation with vector control).
● Rotating measurement (Page 254) with p1960
To improve the torque accuracy and to optimize the speed control. This should be
performed only after a motor data identification.
Note
If there is a motor brake, it must be open for the rotating measurement (p1215 = 2).
For synchronous motors, the motor brake must also be open for the standstill measurement
so that the motor can orient itself.
The two motor data identifications can be selected more easily via p1900.
● p1900 = 2
Activates the standstill measurement (motor not rotating).
● p1900 = 1
Additionally activates the rotating measurement. p1910 is set to = 1, and p1960 is set
depending on the actual control mode (p1300).
The rotating measurement can also be activated subsequently using p1900 = 3.
If a synchronous motor is being used (p0300 = 2), then with p1900 > 0, the encoder
adjustment (p1990 = 1) is automatically activated. The procedure used can be set in p1980.
For the selection p1900 = 1, 3, the parameter p1960 is set depending on p1300:
● p1960 = 1, when p1300 = 20 or 22 (without encoder)
● p1960 = 2, when p1300 = 21 or 23 (with encoder)