Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 15.4, Problem 7RQ
Program Plan Intro
Counter:
- It is similar to the timer concept.
- It is used to count the changes that are produced by the state of an outside trigger signal.
- It is a programmable logic controller (PLC) instruction that either counts up or counts down an integer value when produced by the change of a bit from “0” to “1” or “false” to “true”.
- In PLC, counter contains three types.
- Up counters.
- Down counters.
- Up/Down counters.
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Chapter 15 Solutions
Programmable Logic Controllers
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