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 1, Problem 3P
Program Plan Intro

AND Operator:

  • An AND operator accepts two inputs and produces a single output.
  • If both the inputs are CLOSE, then the output is ON. Otherwise, the output is OFF.
  • In Boolean expression, the AND operation is expressed using the “.” dot operator or “*” asterisk operator.

  X= B     or      X=A * B

  where A and B are the inputs and X is the output.

Truth table for AND operator:

INPUTA

INPUT

B

OUTPUT

X

OPENOPENOFF
OPENCLOSEOFF
CLOSEOPENOFF
CLOSECLOSEON

OR Operator:

  • An OR operator accepts two inputs and produces a single output.
  • If both the inputs are OPEN, then the output is OFF. Otherwise, the output is ON.
  • In Boolean expression, the OR operation is expressed using the “+” plus sign.

    X=A+B

  where A and B are the inputs and X is the output.

Truth table for OR operator:

INPUTA

INPUT

B

OUTPUT

X

OPENOPENOFF
OPENCLOSEON
CLOSEOPENON
CLOSECLOSEON

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Need help answering these questions!1. Design a While loop that lets the user enter a number. The number should be multiplied by 10, and the result stored in a variable named product. The loop should iterate as long as the product contains a value less than 100.   2. Design a For loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000   3. Convert the While loop in the following code to a Do-While loop:     Declare Integer x = 1     While x > 0        Display "Enter a number."        Input x     End While
Need help with these:Design a While loop that lets the user enter a number. The number should be multiplied by 10, and the result stored in a variable named product. The loop should iterate as long as the product contains a value less than 100.   2. Design a For loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000   3. Convert the While loop in the following code to a Do-While loop:     Declare Integer x = 1     While x > 0        Display "Enter a number."        Input x     End While
Convert the While loop in the following code to a Do-While loop:    Declare Integer x = 1    While x > 0       Display "Enter a number."       Input x    End While
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