Modbus is the Grand-daddy of industrial protocols. It has been around since the mid-70s. One would think it had gone the way of the Eight-track tape by now. I have heard, ‘Oh Modbus, it is dead – isn’t it?’ Well, No, it is not. As I have travelled around doing field service, I keep seeing it all over the place. Monitoring applications are its big area of applications. However, it is also being deployed in other areas as well.

A few years ago, I had a large company ask me if I taught Modbus.  I did not have the course, but I did have most of the materials and close to 30 years of experience working with it. I decided to develop a Modbus course for them. At the time, I thought, ‘Everyone knows about Modbus.’ I may only sell this course once. Well, the course went on to become my third most popular course.

I also like the protocol;

  • it is simple compared to many industrial protocols, and there is beauty in that
  • it is easy to deploy
  • it is low-cost to deploy
  • it works great for monitoring applications!

Modbus is alive and well and living at JCOM Automation Inc.

JCOM Automation Inc. is pleased to announce that we are one of the latest 4next distributors in Canada. 4next is an Italian company that makes great Modbus products; gateway/bridge, datalogger, and I/O. It is a good fit. We already had connectors, switches, and Modbus TCP IO racks. This complements our current offering.


I also played with the 4next products. It is well-engineered and easy to use. I really liked them.

Please check out all of our Modbus products at:

… and one more thing

We have a great Modbus Troubleshooting and Maintenance course that will show you how Modbus works and how to deploy it. I have added many of the 4next products to this course to make this even more hands-on. I have an in-person class in Peterborough on October 17th and an online version on October 20th.

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