Siemens SINAMICS S120 Commissioning Manual page 204

Commissioning
2.13 Commissioning SIMOTICS 1FW6 built-in torque motors
Evaluation of the results (applies to both measuring techniques)
For a positive drive direction (definition, refer to the diagram "Determining the positive
direction of the drive (Page 185)", the sawtooth must increase monotonously between 0° and
360°, refer to the diagram "Ideal characteristic of the EMF voltages and the pole position
angle for an optimally commutated drive (Page 200)."
If the curve is falling monotonously, and the phase sequence is EMF phase U - EMF phase
V - EMF phase W, then you must change the control sense of the drive if necessary via
p0410 bit 0 "Invert speed actual value". If the position controller is being used, then you must
also check p0410 bit 1 "Invert position actual value".
Figure 2-64
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" in Chapter
"Parameterizing a motor and encoder", the drive direction is negative (i.e. when viewing the
DE flange the axis is rotating counterclockwise).
202
EMF for incorrect speed actual value inversion
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Commissioning Manual