Siemens SINAMICS S120 Function Manual page 151

Carrying out the rotating measurement (p1960 > 0)
The following measurements are carried out when the enable signals are set and a switch-
on command is issued in accordance with the settings in p1959 and p1960.
● Encoder test
● Only for induction motors:
● Speed controller optimization
● Acceleration pre-control setting (p1496)
● Setting for ratio between the total moment of inertia and that of the motor (p0342)
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
If a speed encoder is used, the direction of rotation and the pulse number are checked.
– Measurement of the saturation characteristic (p0362 to p0369)
– Measurement of the magnetization current (p0320) and determination of the offset
voltage of the converter for offset compensation
– Measurement of the saturation of the leakage inductance, for induction motors, and
setting of the current controller adaptation (p0391...p0393)
This is automatically activated with 1LA1 and 1LA8 motors (p0300 = 11, 18) (see
p1959.5).
– p1470 and p1472, when p1960 = 1 (operation without encoder)
– p1460 and p1462, when p1960 = 2 (operation with encoder)
– Kp adaptation switch-off
Note
To set the new controller setting permanently, the data must be saved in a non-volatile
memory. Refer to Chapter "Parameters"
DANGER
During speed controller optimization, the drive triggers movements in the motor that can
reach the maximum motor speed. The emergency OFF functions must be fully
operational during commissioning. To protect the machines and personnel, the relevant
safety regulations must be observed.
Note
If speed control optimization is used for operation with encoder, then the control operating
mode is automatically reset to speed control without encoder, so that the encoder test
can be carried out.
4.12 Motor data identification and rotating measurement
Vector control
151