Rockwell-automation 1794-ID2 U.MNL INCREMENTAL ENCODER User Manual Page 21

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1–9Overview of the Incremental Encoder Module
-%#,#(' 0 / 
%-
(-',* !#+,*
(-',* !#+,*
*+, !#+,*
(!#


(!#
Count Up pulse (+)
Count Down pulse (-)
(-',*
(-',* *+,%-
Note:  ," )*+, *!#+,* .%-  ," (-',* *,#'+ ," .%- 
Filter Function
The filter function is only valid during mode 000 (pulse counting).
You enable the filter function by setting bits in Control word 2. Each
counter can be individually filtered by enabling its associated filter
control bit. However the filter is common to both counters.
When a counter is in mode 000 and its filter is enabled, signal A is
internally sampled at a rate 8 times higher than the filter constant. A
change of state in A has to be valid during 4 samples before it
reaches the counter.
-,)-, *(& #%,*
&)% %($
',*'% (-',*
12 30 120 120 3
3
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