Chapter 11, Problem 1RQ

Explain the function of math instructions as applied to the PLC.

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.

Math instruction:

• Math instructions refer to all output instructions that uses the data of two words or registers and perform the desired function.
• Math instructions are program based on the type of processor used.

Explanation of Solution

Function of math instructions:

• The data manipulation instructions are almost similar to math instructions.
• The math instruction allows the PLC to take on more of conventional computer qualities.
• Math instructions are normally used to perform arithmetic functions on the values stored in memory words or registers.
• Some of the examples include combining parts involved, calculating run rates, etc.