Siemens SINAMICS S120 Function Manual page 357

Example of a pulse number step-up ratio
The leading encoder outputs three pulses and one zero mark per revolution. However, the
application requires eight pulses per revolution. By setting p4408 and p4418, the required
eight pulses a revolution are available at X520 of the TM41.
Figure 6-19 Step-up ratio of the encoder pulse number
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Basic functions
6.23 Terminal Module 41
355