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

Organizing the screen into multiple layouts

One very common, but very poor, design decision in HMI development is to group multiple different screen responsibilities or way too much information on a single screen. There are many reasons why this is bad. Some reasons are as follows:

  • Screen disorganization
  • Cluttered appearance
  • Poor usability
  • Overloading the operator with irrelevant information

These are just a few reasons why screen organization is very important. However, one of the most important is overloading the operator with information. Generally, you only want to display the information that is relevant to the operator. If you include too much information, the operator can easily become confused or they can tune the information out and, ultimately, ignore important developments. One common way to combat this is to split an HMI application into multiple different screens.

Generally, screen organization can be determined with the one-sentence rule...