Siemens Sinamics S120 Function Manual page 179

In addition to the equivalent circuit diagram data, motor data identification (p1910 = 3) can
be used for induction motors to determine the magnetization characteristic of the motor. Due
to the higher accuracy, the magnetization characteristic should, if possible, be determined
during the rotating measurement (without encoder: p1960 = 1, 3; with encoder: p1960 = 2,
4). If the drive is operated in the field-weakening range, this characteristic should be
determined for vector control in particular. The magnetization characteristic can be used to
calculate the field-generating current in the field-weakening range more accurately, thereby
increasing torque accuracy.
Note
In comparison with the standstill measurement (p1910), for induction motors, the rotating
measurement (p1960) allows the rated magnetization current and saturation characteristic to
be determined more accurately.
Figure 4-21
Note
To set the new controller setting permanently, the data must be saved in a non-volatile
memory.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Magnetization characteristic
4.14 Motor data identification and rotating measurement
Vector control
177