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

Guiding principles for library development

Developing an effective library can be tricky. Where you have a clear-cut application in mind when developing a PLC program for a machine, developing a library will be a bit different. When you’re developing a library, you have to think of everything at a very generic level. You will not know ahead of time who will use the library, how they will use the library, or what they will use the library for. Hence, creating a good library can be a very tricky and daunting task. There are no clear-cut ways to create a perfect library but there are a few rules that I came across that have helped me develop some decent libraries.

Rule 1 – Keep it simple, stupid (KISS)

KISS is the golden rule for many programmers. When it comes to developing libraries, you must keep it as simple as possible. Generally, you need to have a very clear issue in mind that the library is designed to solve. Now, libraries can have many different functionalities...