Siemens SINAMICS S120 Commissioning Manual page 145

The counting direction of the measuring system is positive if the sensor head moves relative
to the gold band in the cable outlet direction.
Figure 2-38
Note
If the sensor head is mechanically connected to the primary section, the cable outlet
direction must be different. Otherwise, invert the actual value.
Commissioning Manual
Commissioning Manual, (IH1), 01/2011, 6SL3097-4AF00-0BP1
Determining the counting direction for measuring systems from Renishaw
2.13 Commissioning linear motors (servo)
Commissioning
143