Count type, Counter function block timing charts, Count type counter function block timing charts – Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual User Manual
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Rockwell Automation Publication 1752-UM001E-EN-P - June 2014
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Function Blocks Command Reference
Appendix D
Count Type
The count type can be set to down counter (decrementing) or up counter
(incrementing).
With a down counter, the preset value is the counter’s initial value and the
counter decrements by one count each time an input pulse is detected. The
Output Enable signal turns on when the count reaches zero. This function block’s
preset value is stored in the function block’s internal work area, and can be
monitored from a programming device.
With an up counter, the counter’s initial value is zero, and the counter increments
by one count each time an input pulse is detected. The Output Enable signal
turns on when the count reaches the preset value.
Counter Function Block Timing Charts
Figure 84 - Auto Reset Up Counter
Figure 85 - Auto Reset Down Counter
Input 1
Count
Idle to Run
Output 1
Preset Value
Input 1
Count
Idle to Run
Output 1
Preset Value