Siemens Sinamics s120 Commissioning Manual page 215

If the curve is monotonously decreasing, and the phase sequence is EMF phase U –
EMF phase W – EMF phase V (i.e. if the phase sequence of V and W is interchanged), then
according to the diagram "Determining the positive direction of the drive" (Page 197) in
Chapter "Parameterizing a motor and encoder", the drive direction is negative (i.e. the
primary section moves relative to the secondary section in the cable outlet direction).
Image 3-65 EMC for the negative travel direction
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
3.13 Commissioning of SIMOTICS L-1FN3 linear motors
Commissioning
215