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

Final project – a painting machine

Painting machines are often complex devices that have many moving parts. For our final project, we are going to build a simulated device that can move the part on a conveyor belt and paint a sentence on the part. For this project, we are going to set the following requirements:

  • Drive the conveyor belt (belt on/off)
  • Select between two paint APIs
  • Paint a message on a part

With these requirements, we can formulate a design like the following:

Figure 10.15 – Painter design

Figure 10.15 – Painter design

Compared to other programs that have been presented in the book so far, this one has many more components and lines of code. As such, no code for this example will be displayed in the book. However, a working example can be found at the URL that was provided in the Technical requirements section. For this chapter example, the code can be found in the final project directory.

In this case, the PLC_PRG file is going...