Rockwell Automation 1746-HSCE,D17466.5 High-Speed Counter Module - Manual (Page 24)

Publication 1746-UM006B-EN-P - August 2005
2-6 Module Operation
Up/Down Pulse Inputs With this input type, the counter increments on the rising edge of
pulses applied to input A and decrements on the rising edge of pulses
applied to input B. If pulses are applied to inputs A and B
simultaneously, the pulse counter retains its previous value.
The counter can be reset as described in Counter Reset Control on
page 2-9.
IMPORTANT
Specific wiring information is contained in Chapter 3.
Decrement pulse
Incrementing encoder
module
Increment pulse
or sensor
Increment pulse
1 2 3 2 1 0 1 2 Count
Decrementing encoder
or sensor
Decrement pulse
(count up)
(count down)
Input A
Input B
Input Z