Programmable Logic Controllers
Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
Question
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Chapter 13, Problem 26RQ
Program Plan Intro

Processor:

  • A Central Processing Unit (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.

Temporary end instruction:

  • The Temporary end (TND) instruction refers to a diagnostic instruction.
  • It is used for troubleshooting.
  • It is used whenever the amount of logic scanned must be changed to debug a program.
  • The TND command must be placed on the right side of the rung.

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In case of a mistake, the current instruction will be cleared.
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