Programmable Logic Controllers
Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
bartleby

Concept explainers

Question
Book Icon
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

Blurred answer
Students have asked these similar questions
1. Checksum. Assuming the following IP header lacking checksum: 01000101.00000000.11000011.00101010. 00000000.00000000.00000000.00000000. 10000000.00000000.00000000.00000000. <- checksum 01100011.11011001.00000000.00000001. 10000000.00000000.00000000.00000010 Compute its checksum
I would like to know the features of BranchCache, Metadata, and LPR Port Monitor
Please answer the JAVA OOP questions below: How do arrays of objects differ from arrays of primitive types? Why and when would you use an array of objects? What are the different ways to initialize an array of objects? What is a static variable in Java?  How does its scope differ from instance variables? When should you use static variables?  Provide examples where static variables are beneficial over instance variables. What is the difference between static and non-static methods in the Data Definition Class?  What are the benefits of using static methods?
Knowledge Booster
Background pattern image
Computer Science
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
Text book image
C++ for Engineers and Scientists
Computer Science
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Course Technology Ptr
Text book image
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
Text book image
A+ Guide to Hardware (Standalone Book) (MindTap C...
Computer Science
ISBN:9781305266452
Author:Jean Andrews
Publisher:Cengage Learning
Text book image
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
Text book image
Programming with Microsoft Visual Basic 2017
Computer Science
ISBN:9781337102124
Author:Diane Zak
Publisher:Cengage Learning