Siemens SINAMICS S120 Function Manual page 449

Example
Rotary encoder, ball screw with a pitch of 10 mm/revolution. 10 mm should have a resolution
of 1 µm (i.e. 1 LU = 1 µm).
● One load revolution corresponds to 10000 LU
● p2506 = 10000
Note
The effective actual value resolution is obtained from the product of the encoder pulses (p0408)
and the fine resolution (p0418) and a measuring gear that is possibly being used (p0402,
p0432, p0433).
Figure 9-7
Linear encoder
For a linear encoder, the interrelationship between the physical quantity and the neutral length
unit LU is configured using parameter p2503 (LU/10 mm).
Example
Linear encoder, 10 mm should have a resolution of 1 µm (i.e. 1 LU = 1 µm).
● p2503 = 10000
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Actual position value sensing with rotary encoders
Function modules
9.7 Position control
447