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 10RQ
Program Plan Intro

File Copy (COP) instruction:

  • The COP instruction is used to copy a block of data from one location to another for each scan during false-to-true transition.
  • It does not contain any status bits.
  • As soon as the instruction is executed, all the elements are copied from the source file to the destination file, each time in ascending order.

File-File (FLL) instruction:

  • This instruction is used to fill the words of a file using source value.
  • It can transfer the entire data file in one scan by selecting the ALL mode of control structure.
  • This instruction does not contain any status bits.

File Arithmetic and Logic (FAL) instruction:

  • The FAL instruction is used to copy the contents of one file from location to another.
  • It performs file arithmetic and logic operations on the contents of each file.
  • There are mainly six parameters and addresses which must be entered into the FAL instruction. They are as follows:
    • Control
    • Length
    • Position
    • Mode
    • Destination
    • Expression

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