Siemens Sinamics s120 Commissioning Manual page 266

Commissioning
3.18 Commissioning SIMOTICS T-1FW6 built-in torque motors
Recording the phase voltage and the pole position angle using the STARTER trace function
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-connected motors, see Chapter "Special case parallel connection (Page 272)".
1. Set the following parameters:
Image 3-91 Assignment of trace channels to check the angular commutation offset
The drive is operated in the open-loop torque controlled mode. The following
parameterization is required:
2. Set p0640 = 0, to limit the motor current to 0.
266
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5