Motor Data Identification And Rotating Measurement; Overview - Siemens SINAMICS S120 Function Manual

Vector control

5.14 Motor data identification and rotating measurement

5.14 Motor data identification and rotating measurement
5.14.1

Overview

There are two motor data identification options which are based on each other:
● Motor data identification (Page 225) with p1910 (standstill measurement)
For measurement of the motor equivalent circuit diagram parameters (obligatory for
operation with vector control).
● Rotating measurement (Page 229) 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 selects
the standstill measurement (motor not rotating). The setting p1900 = 1 also activates the
rotating measurement, i.e. with the setting of p1910 = 1 and p1960 depending on the current
control mode (p1300). The rotating measurement can also be activated subsequently using
p1900 = 3.
If a permanent-magnet 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)
The measurements, parameterized using p1900 are started in the following sequence after
the drive has been enabled:
Measurements and
conclusion
Standstill measurement Pulse inhibit activated and parameter is set to "0": p1910 = 0
Encoder adjustment
Rotating measurement
Successful completion
224
After successful measurement:
Pulse inhibit activated and parameter is set to "0": p1990 = 0
Pulse inhibit activated and parameter is set to "0": p1960 = 0
Pulse inhibit activated and parameter is set to "0": p1900 = 0
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions