Siemens SIMATIC CM35 Manual page 116

CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
Edge evaluation
You can parameterize whether the encoder pulses are to be evaluated once,
twice or four times.
Track A
Figure 8-3 Single evaluation of the encoder pulses
Track A
Figure 8-4 Double evaluation of the encoder pulses
Track A
Track B
Figure 8-5 Quadruple evaluation of the encoder pulses
Note
The more edges are evaluated, the better the resolution is. For example, the
resolution of the same traversing path is four times higher with quadruple
evaluation than with single evaluation. Regardless of whether single, double
or quadruple evaluation is set, both encoder tracks (A and B) must always be
connected to the CM35.
Positioning Operating mode
+1
All falling edges of track A
+1 +2 +3
All edges of track A
+1 +2 +3 +4 +5 +6 +7
All edges of both tracks
+2
8-5