Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 2, Problem 1RQ
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 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.
Expert Solution & Answer
Explanation of Solution
Function of a PLC input interface module:
- The I/O interface module acts as an interface between the field devices and the CPU of the PLC.
- The input interface module of a PLC is the module by which all the input field devices are connected to the CPU of the PLC.
- The main purpose of an input interface module is to get signals from machines or devices.
- Then, those signals are converted into other form of signals that can be used by the controller.
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Chapter 2 Solutions
Programmable Logic Controllers
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