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Mastering PLC Programming

You're reading from   Mastering PLC Programming The software engineering survival guide to automation programming

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Product type Paperback
Published in Mar 2023
Publisher Packt
ISBN-13 9781804612880
Length 386 pages
Edition 1st Edition
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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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Table of Contents (25) Chapters Close

Preface 1. Part 1 – An Introduction to Advanced PLC Programming
2. Chapter 1: Software Engineering for PLCs FREE CHAPTER 3. Chapter 2: Advanced Structured Text — Programming a PLC in Easy-to-Read English 4. Chapter 3: Debugging — Making Your Code Work 5. Chapter 4: Complex Variable Declaration — Using Variables to Their Fullest 6. Part 2 – Modularity and Objects
7. Chapter 5: Functions — Making Code Modular and Maintainable 8. Chapter 6: Object-Oriented Programming — Reducing, Reusing, and Recycling Code 9. Chapter 7: OOP — The Power of Objects 10. Part 3 – Software Engineering for PLCs
11. Chapter 8: Libraries — Write Once, Use Anywhere 12. Chapter 9: The SDLC — Navigating the SDLC to Create Great Code 13. Chapter 10: Advanced Coding — Using SOLID to Make Solid Code 14. Part 4 – HMIs and Alarms
15. Chapter 11: HMIs — UIs for PLCs 16. Chapter 12: Industrial Controls — User Inputs and Outputs 17. Chapter 13: Layouts — Making HMIs User-Friendly 18. Chapter 14: Alarms — Avoiding Catastrophic Issues with Alarms 19. Part 5 – Final Project and Thoughts
20. Chapter 15: Putting It All Together — The Final Project 21. Chapter 16: Distributed Control Systems, PLCs, and Networking 22. Assessments 23. Index 24. Other Books You May Enjoy

Final project – creating a unit converter

In automation programming, it is very common to have to convert between different units of measurement to support clients around the world. This is especially true if you have a single codebase that supports a specific machine that is deployed to many different regions. To accommodate the different units of measurement, it is common to create a function block that can do this. For our final project, we are going to create a very simple function block that can convert the following units:

  • Lbs -> kgs and kgs -> lbs
  • Feet -> meters and meters -> feet

Depending on what you’re working on, there will probably be many more units; however, this is just an example.

The first thing we need to do is create a function block called UnitConversion and add two methods called weight and length to it. Both methods should have a Return type value of REAL and an Access specifier value of PUBLIC. When you’re...

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