Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 216)

Preface MicroLogix 1000 Programmable Controllers User Manual
12–2
About the High-Speed Counter Instructions
The high-speed counter instructions used in your ladder program configure, control,
and monitor the controllers’ hardware counter. The hardware counter’s accumulator
increments or decrements in response to external input signals. When the
high-speed counter is enabled, data table counter C5:0 is used by the ladder program
for monitoring the high-speed counter accumulator and status. The high-speed
counter operates independent of the controller scan.
When using the high-speed counter, make sure you adjust your input filters
accordingly. See page A–7 for more information on input filters.
Before you learn about these instructions, read the overview that follows on the next
page. Refer to page 2–24 for information on wiring your controller for high-speed
counter applications.