Siemens SINAMICS S120 Function Manual page 208

Vector control
4.14 Motor data identification and rotating measurement
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 standstill measurement (p1910) for induction motors, rotating
measurement (p1960) allows the rated magnetizing current and saturation characteristic to
be determined more accurately.
Figure 4-20
Note
To set the new controller setting permanently, the data must be saved in a non-volatile
memory.
Motor data identification sequence
1. Enter p1910 > 0. Alarm A07991 is displayed.
2. Motor data identification starts the next time that the motor is switched on.
3. p1910 resets itself to "0" (successful identification) or fault F07990 is output.
4. r0047 displays the current status of the measurement.
206
Magnetization characteristic
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions