The Modbus protocol is still one of the most widely used automation protocols in the process industry. If you are a technical person who has had to implement control systems, especially PLC-based control systems, then you would know that a knowledge of Modbus is essential in connecting equipment from different manufacturers. Furthermore, Modbus more often than not is implemented over the RS485 physical medium.
So knowing Modbus RS485 networking is essential for control systems implementation. But most professionals learn about the Modbus protocol by scouring the internet for bits and pieces of information, which takes time and also can be quite confusing. This is what happened to me when I came out of university with a degree in Elec. Eng. I was not taught the practical technologies that were existing in the industry. So I had to learn the hard way.
So it is my mission now to create online video courses to prevent new persons in the field from having to go through the same wasteful learning curve with many of the technical disciplines in the automation field.
I have started with Modbus on RS485. I have created a course called "Mastering Modbus RS485 Network Communication". I created it as a 1.5 hours video course on the popular learning platform called uDemy. A sample video is shown at the bottom of this post.
So if you want to learn about Modbus RS485 communication or if you already know about it but want to view the course and give some feedback, please go to this link ... http://freemodbusrs485course.simplelander.com/
It's completely FREE, you just have to go through some sign-up steps. I really hope that many people benefit from the course that I have created.