Programmable Logic Controllers
Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 10, Problem 14RQ
Program Plan Intro

Data manipulation instructions:

  • Data manipulation instructions enable the numerical data that exists in the controller’s memory to be performed within the control program.
  • Data manipulation instructions allows manipulation of data that is stored in either single or multiple words groups.
  • It also includes the transfer of data from one data memory area of the Programmable Logic Controller (PLC) to another.
  • In order to accomplish data manipulation, there are mainly two different kinds of instructions.
    • Instructions which operate on word data.
    • Instructions which operate on file or block.
  • There are mainly two broad categories of data manipulation instructions as follows:
    • Data transfer instructions
    • Data comparison instructions

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