Siemens Sinamics S120 Function Manual page 306

Basic functions
6.22 Terminal Module 41
Example of a pulse number step-up ratio with three zero positions
The leading encoder outputs three pulses and one zero mark per revolution. However, the
application requires 8 pulses and 3 zero marks per revolution. By setting p4408 and p4418,
the required 8 pulses and the additional 3 zero marks per revolution are available at X520 of
the TM41.
Figure 6-20 Number of encoder pulses plus 3 zero marks
Parameter assignment
The pulse numbers of the leading encoder (the signal source) are set using p4408 and
p4418. To synchronize the generated zero mark with the zero mark of the leading encoder,
the pulse number per encoder revolution of the encoder at the TM41 input (p4408) must
always precisely coincide with the pulse number per encoder revolution of the encoder
interconnected at connector input p4420.
The pulse numbers emulated by the TM41 are set using p0408 and p0418. If p4408 and
p4418 are set to 0, then the values of p0408 and p0418 are also valid for the output from
TM41.
Diagnostic options
Parameter r4419 shows the calculated position setpoint after the step-up/step-down. Using
the trace function of the STARTER commissioning tool, you can check the step-up/step-
down function based on r4419.
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Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions