Siemens Sinamics s120 Commissioning Manual page 197

Determining the drive direction
The direction of the drive rotation is positive if the primary section moves relative to the
secondary section in the opposite direction to the cable outlet direction.
Image 3-53
Determining the counting direction of the measuring system
The counting direction depends on the measuring system and the mounting position. The
counting direction of the measuring system must match the travel direction of the motor. If
necessary, you must adapt the counting direction by making the appropriate parameter
assignment. Please refer to the manufacturer's documentation for the measuring system. If
necessary, you must invert the counting direction, as described in the "Screen form to enter
additional encoder data" (Page 196) figure.
Note
Checking the counting direction of the measuring system
The measuring system counting direction can also be checked, by first parameterizing the
drive, and then manually moving it with the enable signals inhibited.
If the axis is moved in the positive direction, the actual speed value must also count in the
positive direction.
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
Determining the positive direction of the drive
3.13 Commissioning of SIMOTICS L-1FN3 linear motors
Commissioning
197