Activities Manual For Programmable Logic Controllers
Activities Manual For Programmable Logic Controllers
5th Edition
ISBN: 9781259682476
Author: Frank Petruzella
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 2, Problem 41RQ

Explanation of Solution

Modes of operation:

The three modes of operation which can be selected by the key switch of a processor are as follows:

  • RUN position mode
  • PROG position mode
  • REM position mode

RUN position mode:

  • To execute ladder program and activate output devices, the processor is made in RUN mode.
  • When a processor is in RUN mode, it disables online program editing and also prevents to change the processor mode using programmer interface device.

PROG position mode:

  • Here, the term PROG refers to program.
  • When the processor is in PROG mode, it secures the processor from scanning or executing the ladder program...

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Chapter 2 Solutions

Activities Manual For Programmable Logic Controllers

Ch. 2 - Prob. 11RQCh. 2 - What are the advantage and the disadvantage of...Ch. 2 - With reference to PLC discrete input modules: a....Ch. 2 - Prob. 14RQCh. 2 - Explain the function of the backplane of a PLC...Ch. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - What electronic element can be used as the...Ch. 2 - With reference to discrete output module current...Ch. 2 - What electronic element can be used as the...Ch. 2 - Prob. 22RQCh. 2 - Prob. 23RQCh. 2 - Prob. 24RQCh. 2 - Prob. 25RQCh. 2 - Prob. 26RQCh. 2 - Prob. 27RQCh. 2 - Prob. 28RQCh. 2 - Prob. 29RQCh. 2 - Explain the difference between a unipolar and...Ch. 2 - Prob. 31RQCh. 2 - In what two ways can the loop power for current...Ch. 2 - Prob. 33RQCh. 2 - Prob. 34RQCh. 2 - Prob. 35RQCh. 2 - Write a short explanation for each of the...Ch. 2 - Write a short explanation for each of the...Ch. 2 - Prob. 38RQCh. 2 - Prob. 39RQCh. 2 - Prob. 40RQCh. 2 - Prob. 41RQCh. 2 - Prob. 42RQCh. 2 - Prob. 43RQCh. 2 - Prob. 44RQCh. 2 - Prob. 45RQCh. 2 - Prob. 46RQCh. 2 - Prob. 47RQCh. 2 - What information is normally stored in the ROM...Ch. 2 - Prob. 49RQCh. 2 - Prob. 50RQCh. 2 - Prob. 51RQCh. 2 - Prob. 52RQCh. 2 - Prob. 53RQCh. 2 - Prob. 54RQCh. 2 - Prob. 55RQCh. 2 - Prob. 56RQCh. 2 - Prob. 57RQCh. 2 - Prob. 58RQCh. 2 - Prob. 59RQCh. 2 - Prob. 60RQCh. 2 - What is the function of a transducer?Ch. 2 - Prob. 62RQCh. 2 - Prob. 1PCh. 2 - Assume a thermocouple, which supplies the input to...Ch. 2 - With reference to I/O module specifications: a. If...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6P
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