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Mastering Modbus RS485 Network Communication (Udemy.com)

Learn how to design, implement and manage the most popular automation networking system in the world.

Created by: Emile Ackbarali

Last updated May 2026

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What you will learn

  • The Origins of the Modbus Protocol and RS485
  • Understand Memory Address vs. Memory Value
  • Memory Addressing Conventions
  • Typical Device Memory Map
  • Protocol Network Messaging
  • RS485 Standard and Device Interconnection
  • Protocol Data Frame Structure
  • Query - Response Cycle
  • Function Codes and Master Commands
  • Modbus Simulation using FREE Simulation Software
  • Troubleshooting and Exception Codes
  • Floating Point Data Structure
  • Modbus Communication with Programmable Logic Controller
  • Full Course Support Documentation

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Course Description

The Modbus protocol is the oldest and still by far the most popular automation protocol in the field of process automation and SCADA. Knowing how to create Modbus based networks that run on the RS485 serial communication standard is essential for any electrical technician and engineer working in these fields. Being able to integrate devices from different manufacturers is a skill that is in demand and will ultimately make you more valuable and marketable in the industry.

This course gives you the theory behind the Modbus Protocol as well as RS485. It then goes on to show you how they work together to create a Modbus RS485 network. Two freeware applications are then used to create a Modbus network right on your PC so you can see the communication in action. 

After completing this course, you will be able to integrate devices from the same manufacturers and different manufacturers, that are Modbus compliant, to form a complete seamless network. You will know how the Modbus protocol operates at the bit and byte level allowing you to troubleshooting any Modbus RS485 issue.

To achieve this we will be using the two most popular Modbus software tools on the market - Modscan and Modsim.

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Instructor Details

Emile Ackbarali

          I have been working in the fields of Software Development, Software Systems Integration and Process Automation since 1996. In 2003, I stepped out on my own and started working for myself providing software development and systems integration services to small and medium businesses.       

          Teaching has always been a passion for me. I have taught at the tertiary level for many years on the subjects of programming, control systems as well as systems integration. In the last few years I found myself incorporating more and more videos into the curriculum with amazing results. 

          When I heard of uDemy I just could not help but sign up. With teaching in a classroom, you can reach only so many students, but with uDemy you can reach the world! I plan to publish and promote as many courses as I possibly can on the uDemy platform. 

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Reviews

4.7

3,854 ratings on Udemy

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By Fernando Contreras Tolentino on 8/22/2026

Muy buen curso, te da las bases muy solidas para que entiendas de manera muy clara como es que va el flujo de informacion del maestro y el esclavo, y detectar errores. Me hubiera gustado que incluyera mas ejemplos con diferentes equipos y una parte dedicada a troubleshooting para resolver errores. Pero si recomiendo el curso para alguien que esta completamente en cero.

By M.shanmuga Raja on 8/14/2026

happy to learn easy to understanding, actually i am now feel little confidence and comfortable after complete this course ,thankyou so much for giving this wonder full flatform to learn by online .

By Pawan Maurya on 6/24/2026

It is fantastic journey of learning with you, i am choosing you as an instructor to learn the automation communication. May be in future you will launch more lecture.

By Geraldo Tchipenda on 6/2/2026

Excellent course that provides a clear and practical on Modbus and RS485 communication. The explanations are easy to follow, and the hands-on exercises with Modscan and Modsim, it helps to understand both the theory and real-world applications. Highly recommended for anyone working in automation, PLCs, or SCADA systems. Thank you!

By DEEPESH PRAKASH PATEL on 4/11/2026

detailed description , i liked it , i have already registered for other courses related to modbus , would like to dive deeper in automation , with Professor lectures. and upgrade my carrier as Electrical and Automation engineer

By Daniel De Los Ríos on 3/24/2026

The instructor explains the theory very well and implement the concepts with practical examples. It allow me to establish my own Modbus RTU RS485 communication on my project and to understand what's happening for troubleshooting. I do recommend this course.

By Albert Martinez on 2/12/2026

I've been in the automation industry for 6 years and thoroughly enjoy it!! I find that there is always something new to learn, for me at the current moment that would be Modbus protocol. This course explains in easy to understand terms how Modbus works and how to implement it in automation.

By Piotr Świeca on 1/7/2026

Very good course. I learned a lot and I am intersted in the other courses. The videos could be a little longer because break after each 1-2min is distracting and there is a temptation to check your phone in that time.

By Kailash Chand on 12/11/2025

It is good but could be better if doing these practical with some prgramming language.

By Bettina Wolpensinger on 11/28/2025

Love it. I really got hooked, when Emile introduced the simulation tools which I could run on my pc in parallel. Also like the didactics with the design problem, phantastic. And how Emile also explained other resources from the net. Also love his enthusiasm :-)

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Overall Score : 94 / 100