Activities Manual For Programmable Logic Controllers
Activities Manual For Programmable Logic Controllers
5th Edition
ISBN: 9781259682476
Author: Frank Petruzella
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 1, Problem 6RQ
Program Plan Intro

Programmable Logic Controller (PLC):

  • • Programmable Logic Controller (PLC) is a specialized computer used in industrial segments to control machines and process.
  • • PLC is programmable that consists of a set of instructions which resembles the controlling functions needed to perform specific tasks.
  • • The function of PLC is similar to that of a relay and hence, in an industrial segment a relay is greatly replaced by a suitable PLC.
  • • When compared to general PC, a PLC is available in small and tiny sizes.
  • • The basic architecture of a PLC consists of an input-output interface module and a small Central Processing Unit (CPU) that run by control programming language.

Two ways in which I/O is incorporated into PLC:

The two different ways in which input/output is incorporated into PLC are as follows:

  • • Fixed configuration
  • • Modular configuration

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