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PLCs for Beginners

You're reading from   PLCs for Beginners An introductory guide to building robust PLC programs with structured text

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Product type Paperback
Published in May 2024
Publisher Packt
ISBN-13 9781803230931
Length 380 pages
Edition 1st Edition
Tools
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Author (1):
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M. T. White M. T. White
Author Profile Icon M. T. White
M. T. White
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Toc

Table of Contents (25) Chapters Close

Preface 1. Part 1: Basics of Computer Science for PLC Programmers FREE CHAPTER
2. Chapter 1: Computer Science Versus Automation Programming 3. Chapter 2: PLC Components – Integrating PLCs with Other Modules 4. Chapter 3: The Basics of Programming 5. Chapter 4: Unleashing Computer Memory 6. Chapter 5: Designing Programs – Unleashing Pseudocode and Flowcharts 7. Chapter 6: Boolean Algebra 8. Part 2: Introduction to Structured Text Programming
9. Chapter 7: Unlocking the Power of ST 10. Chapter 8: Exploring Variables and Tags 11. Chapter 9: Performing Calculations in Structured Text 12. Chapter 10: Unleashing Built-In Function Blocks 13. Chapter 11: Unlocking the Power of Flow Control 14. Chapter 12: Unlocking Advanced Control Statements 15. Chapter 13: Implementing Tight Loops 16. Part 3: Algorithms, AI, Security, and More
17. Chapter 14: Sorting with Loops 18. Chapter 15: Secure PLC Programming – Stopping Cyberthreats 19. Chapter 16: Troubleshooting PLCs – Fixing Issues 20. Chapter 17: Leveraging Artificial Intelligence (AI) 21. Chapter 18: The Final Project – Programming a Simulated Robot 22. Assessments 23. Index 24. Other Books You May Enjoy

Chapter 12

  1. What is the difference between AND and OR operators?

    For the expression that contains the AND operator to evaluate to true all conditions must evaluate to true. For the expression that contains the OR operator to evaluate to true only one condition must evaluate to true.

  2. What is the NOT operator used for?

    Use to invert the logical expression’s output.

  3. What is a nested IF statement?

    An IF statement inside of another IF statement or CASE statement.

  4. What’s the difference between ELSE and ELSIF statements?

    The ELSEIF is like an extra IF statement. The ELSE is a general-purpose conditional branch that will execute when all other IF and ELSEIF statements evaluate to false.

  5. Can a CASE statement use an ELSE statement?

    Yes.

  6. Can an ELSE statement accept a logical expression?

    No.

  7. What is the truth table for an XOR statement?
...

A

B

Output

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