Siemens SINAMICS S120 Commissioning Manual page 147

For a positive traversing direction, the phase sequence must be U-V-W. The direction of the
drive is positive if the primary section moves relative to the secondary section in the opposite
direction to the cable outlet direction.
Figure 2-40
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 2-41
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
Commissioning Manual
Commissioning Manual, (IH1), 01/2011, 6SL3097-4AF00-0BP1
The positive direction of the drive (clockwise rotating field)
Oscillogram
2.13 Commissioning linear motors (servo)
Commissioning
145