Chapter 2, Problem 38RQ

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 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.

Central Processing Unit (CPU):

• CPU is known to be the central part or component of a computer system.
• CPU is also known as processor.
• The process refers to an electronic circuit within a computer.
• It carries out the program instructions for performing basic arithmetic, logic, controlling, and I/O operations.

Memory:

• Memory refers to a computer part which holds data as well as instructions for processing.
• It is also known as primary storage, primary memory, main memory, Random Access Memory (RAM), and internal storage.
• Almost all types of memory stores the data when the computer is turned on and destroys the data when the machine is turned off.