EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
EBK ACTIVITIES MANUAL FOR PROGRAMMABLE
5th Edition
ISBN: 8220102795983
Author: Petruzella
Publisher: YUZU
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Chapter 5, Problem 11RQ

Explanation of Solution

Symbol and equivalent instruction for NO contact:

  • Examine if Open (XIO) is one of the fundamental symbols that is used to translate relay control logic to contact symbolic logic.
  • The XIO instruction is represented by the symbol which almost resembles a normally-open relay contact.
  • Examine-OFF instruction is another name for XIO instruction.
  • This instruction asks the processor to examine whether the contact is OPEN or not.
  • The symbol used to represent a NO contact is as follows

Symbol and equivalent instruction for NC contact:

  • Examine if Closed (XIC) is one of the fundamental symbols that is used to translate relay control logic to contact symbolic logic.
  • The XIC instruction is represented by the symbol which almost resembles a normally-closed relay contact...

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