LogixPro PLC Lab Manual for Programmable Logic Controllers
LogixPro PLC Lab Manual for Programmable Logic Controllers
5th Edition
ISBN: 9781259680847
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
Question
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Chapter 9, Problem 7RQ
Program Plan Intro

Programmable Logic Controller (PLC):

  • PLC is a specialized computer used in industrial segments to control machines and process.
  • PLC is program 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 runs by control programming language.

Explanation of Solution

b.

Benefits of programming:

  • It is beneficial to program an immediate input or immediate output instruction near the beginning of a program.
  • It is because the I/O data files will have the latest status of input and output at the beginning of the program...

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