Siemens SINAMICS S120 Function Manual page 489

The following interconnections are automatically established after the assignment has been
made.
● p0480[0] (G1_STW) = encoder control word r2520[0]
● p0480[1] (G2_STW) = encoder control word r2520[1]
● p0480[2] (G3_STW) = encoder control word r2520[2]
Figure 8-6
The link between the physical variables and the neutral length unit LU is established via
parameter p2506 (LU per load revolution) for rotary encoders. Parameter p2506 mirrors,
together with p2504, p2505, the interrelationship between encoder increments and the
neutral length unit LU.
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).
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Actual position value sensing with rotary encoders
Function modules
8.7 Position control
489