Siemens SINAMICS V90 Operating Manual page 86

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Generally, backlash occurs when the mechanical force is transferred between a machine
part and its drive.
If the mechanical system was to be adjusted/designed so that there was absolutely no
backlash, this would result in high wear. Thus, backlash can occur between the machine
component and the encoder. For axes with indirect position sensing, mechanical backlash
results in a false traversing distance because the axis, at direction reversal, travels either too
far or not far enough corresponding to the absolute value of the backlash.
You can configure the backlash compensation for V90 PTI on the following panel:
In order to compensate the backlash, the determined backlash must be specified in p2583
with correct polarity. At each direction of rotation reversal, the axis actual value is corrected
dependent on the actual traversing direction.
Note
Backlash compensation for V90 PN
The backlash compensation pane for V90 PN is included in the function pane of "Set
mechanism".
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Operating Manual, 04/2017, A5E36618042-003