Siemens SIMATIC S5 Manual page 46

IP 267
Bit 6: Reference point approach RPA
The reference point marks a system zero point for the IP 267 from
which it starts traversing jobs. You can calculate reference points if
you connect a separate switch (BERO, etc.) to the REF digital input. If
you set bit RPA, a positive edge at the REF digital input initiates
deceleration ( 5.4).
Bit 7: Reduction factor R
You can reduce the frequency range of the stepping rate and the
start/stop rate by a factor of 10 using R. The pulse duration is
unaffected by this.
R="0"
R="1"
EWA 4NEB 812 6061-02a
Addressing and Programming
: Reduction factor 1
: Reduction factor 0.1
4
4-13