Programmable Logic Controllers
Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 4, Problem 4P

Explanation of Solution

a.

Data stored in the destination address of AND operation:

  • In AND operation, the output is always HIGH when all the inputs are HIGH and the output is LOW when any of the inputs are LOW.
  • The AND operation of two inputs “Source A” and “Source B” is given below. Here, the result is stored in destination address.
  • If both the inputs “Source A” and “Source B” are 1, then the output 1 will be displayed on the destination.
  • Otherwise, if either of the inputs “Source A” or “Source B” is 0, then the output 0 will be displayed on the destination.

Source A:

00000000101010

Explanation of Solution

b.

Data stored in the destination address of OR operation:

  • In OR operation, the output is always HIGH when any of the inputs are HIGH and the output is LOW when all the inputs are LOW.
  • The OR operation of two inputs Source A and Source B is given below. Here, the result is stored in destination address.
  • If either of the inputs “Source A” or “Source B” are 1, then the output 1 will be displayed on the destination.
  • Otherwise, if both the inputs “Source A” and “Source B” are 0, then the output 0 will be displayed on the destination.

Source A:

00000000101010

Explanation of Solution

c.

Data stored in the destination address of XOR operation:

  • In Exclusive-OR (XOR) operation, the output is always HIGH when either of the inputs is HIGH and the output is LOW when all the inputs are either HIGH or LOW.
  • The XOR operation of two inputs Source A and Source B is given below. Here, the result is stored in destination address.
  • If either of the inputs “Source A” or “Source B” are 1, then the output 1 will be displayed on the destination.
  • Otherwise, if both the inputs “Source A” and “Source B” are 0 or 1, then the output 0 will be displayed on the destination.

Source A:

00000000101010

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