Siemens SINAMICS S120 Commissioning Manual page 201

You can determine the angular commutation offset by measuring the EMF and the
normalized electrical pole position angle via the analog output. The normalized electrical
pole position angle allows you to parameterize the test socket connections T0 to T2 and
retrieve the signals.
Definition of channels (Ch1 ... Ch4):
● Ch1: EMF phase U with respect to the neutral point
● Ch2: EMF phase V with respect to the neutral point
● Ch3: EMF phase W with respect to the neutral point
● Ch4: Normalized electrical angular pole position via analog output
Figure 2-60 Setting measuring socket T0 on CU320
The status of the coarse and fine synchronization can be read out online via parameter
r1992: r1992.8 (fine synchronization carried out) and r1992.9 (coarse synchronization carried
out).
Commissioning Manual
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
2.13 Commissioning SIMOTICS 1FW6 built-in torque motors
Commissioning
199