Book Image

Mastering PLC Programming

By : Mason White
Book Image

Mastering PLC Programming

By: Mason White

Overview of this book

Object-oriented programming (OOP) is a new feature of PLC programming that has taken the automation world by storm. This book provides you with the necessary skills to succeed in the modern automation programming environment. The book is designed in a way to take you through advanced topics such as OOP design, SOLID programming, the software development lifecycle (SDLC), library design, HMI development, general software engineering practices, and more. To hone your programming skills, each chapter has a simulated real-world project that’ll enable you to apply the skills you’ve learned. In all, this book not only covers complex PLC programming topics, but it also removes the financial barrier that comes with most books as all examples utilize free software. This means that to follow along, you DO NOT need to purchase any PLC hardware or software. By the end of this PLC book, you will have what it takes to create long-lasting codebases for any modern automation project.
Table of Contents (25 chapters)
1
Part 1 – An Introduction to Advanced PLC Programming
6
Part 2 – Modularity and Objects
10
Part 3 – Software Engineering for PLCs
14
Part 4 – HMIs and Alarms
19
Part 5 – Final Project and Thoughts

Best practices for blinking

Nothing says hi-tech and advanced like blinking lights. Everyone loves blinking lights. However, much like many other features that we have seen, blinking can be as much a curse as it can be a blessing. When used properly, blinking can be used to indicate an emergency (such as an issue that could cause harm to personnel or property) or it could mean that a job is loaded and ready to go. In either case, blinking is distracting.

If you blink a component such as an LED, button, popup, or whatever, you need to be aware that this action will take the operator’s attention away from the controls and put their focus on the blinking component. For some things such as issues or emergencies, this is welcomed. However, blinking components for the sake of blinking components is bad. Generally, I will only blink a component under the following conditions:

  • Machine malfunctions
  • Safety-related issues (open door, safety sensor tripped, etc.)
  • E-stop...