EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
5th Edition
ISBN: 8220102795983
Author: Petruzella
Publisher: YUZU
Question
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Chapter 5, Problem 23RQ

a.

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 Personal Computer (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.

Explanation of Solution

b.

Test mode:

  • Test mode is also known as virtual mode.
  • This mode is used to operate and monitor the user program without energizing any outputs.
  • Test mode is mainly divided into three types as follows:
    • Single-step test mode:

Explanation of Solution

c.

Run mode:

  • Run mode is used to execute the user program in the machine with the input devices being monitored and the output devices being energized accordingly...

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