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Mastering PLC Programming

You're reading from  Mastering PLC Programming

Product type Book
Published in Mar 2023
Publisher Packt
ISBN-13 9781804612880
Pages 386 pages
Edition 1st Edition
Languages
Author (1):
Mason White Mason White
Profile icon Mason White

Table of Contents (25) Chapters

Preface 1. Part 1 – An Introduction to Advanced PLC Programming
2. Chapter 1: Software Engineering for PLCs 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 – motor control program

To demonstrate all the concepts we have covered so far, let's build a motor control program. The program will simulate five motors. The motors will be in an array and the program will set the speed of the motors based on a persistent variable. To begin, let us create a motor structure:

TYPE motorStruct :
STRUCT
     motorStateMsg : STRING[20];
     motorState    : BOOL;
     motorSpeed    : INT;
END_STRUCT
END_TYPE

This code will create a structure that will dictate whether the motor is on with a Boolean variable, the motor speed (which will be set with an enum value), and a string that will tell which state the motor is in. After this structure is created, add an enum named motorSpeeds. Once you create the enum, add the code to match the snippet:

{attribute 'qualified_only'}
{attribute 'strict&apos...
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