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

Getting the requirements

Now, that we have a general overview of the goals of the project, we can work on figuring out the requirements. From the overview, we can get the following general project user stories:

  • As an operator, I want to be able to manually set the optimal temperature of the oven so that I can use the oven for different fixtures
  • As an operator, I want to know when the oven is too hot to enter so that I know not to enter the heated area
  • As an operator, I want the door to automatically lock and unlock
  • As an operator, I want to know when the oven’s temperature is at room temperature so that I can safely enter the oven to remove the dry fixtures
  • As an operator, I want to view an alarm when the temperature is over the O-rings’ rated temperature so that I know when the O-ring has been compromised
  • As an operator, I want the PLC to automatically shut down when the oven’s temperature reaches 10°F over the O-rings’...