Siemens SINAMICS S120 Commissioning Manual page 168

Commissioning
2.13 Commissioning linear motors (servo)
Determining the commutation angle using an oscilloscope
Once the oscilloscope has been connected, the drive must first pass the zero mark so that
fine synchronization can be carried out.
The angular, commutation offset can be determined by measuring the EMF and normalized
electrical pole position via an analog output.
Figure 2-44
Definition of channels (Ch1 ... Ch4):
● Ch1 EMF phase U to neutral point
● Ch2: EMF phase V to neutral point
● Ch3: EMF phase W to neutral point
● Ch4: Normalized electrical angular pole position via analog output
Figure 2-45 Setting of the measuring socket T0 on CU320
166
Oscillogram
Commissioning Manual, (IH1), 01/2012, 6SL3097-4AF00-0BP2
Commissioning Manual