Siemens SINAMICS S120 Commissioning Manual page 202

Commissioning
2.13 Commissioning SIMOTICS 1FW6 built-in torque motors
Figure 2-61 Ideal characteristic of EMF voltages and the pole position angle of an optimally commutated drive
Technique, "Recording the phase voltage and pole position angle" using the trace function of the
STARTER commissioning tool
An oscilloscope is not used for this technique. You do not need to disconnect the motor.
However, this technique is less accurate, as the motor voltages are not directly measured,
but calculated from the transistor turn-on duration. This technique is not permitted for parallel
motors, see Chapter "Special case parallel connection (Page 206)".
You must set the following parameters:
Figure 2-62 Assignment of trace channels to check the angular commutation offset
200
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Commissioning Manual