LogixPro PLC Lab Manual for Programmable Logic Controllers
5th Edition
ISBN: 9781259680847
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 6, Problem 27RQ
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 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 runs by controlling
programming language.
Relay:
- A relay is an auxiliary contractor used in control circuit, as a digital input or output to switch on or off an electrical contractor.
- Relays are normally used for low power applications.
- Relays are designed for handling low power loads.
- Relays are mainly used to perform signal detection, transmission, transformation, or processing.
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Chapter 6 Solutions
LogixPro PLC Lab Manual for Programmable Logic Controllers
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