Modbus Troubleshooting and Maintenance course

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Topics Covered:

  • Modbus serial physical layers
  • Modbus commands
  • Modbus monitors
  • Modbus TCP
  • Network design and setup
  • Wiring
  • Troubleshooting

Hands-on Excercises:

  • Modbus RTU communications via RS-485
  • Modbus RTU monitoring
  • Modbus TCP communications
  • Modbus TCP monitoring via Wireshark

Class Day Information:

  • Attendees will receive: course notes, and a certificate of participation
  • Class size is limited to a maximum of 8 people


Cost and Registration:

This course is $1,295 per person. This course can be done in person, onsite, or online.

October 17 – Peterborough

October 20, 2023 – Online

On-demand online or in-person

To register, please email us at:

James Powell, P.Eng.


James Powell, P.Eng., is the principal engineer and owner of JCOM Automation Inc. He has written many articles and two books: HART Communication Protocol – a practical guide, and Catching the process fieldbus – An introduction to PROFIBUS and PROFINET. James is a certified PROFIBUS DP, PA, and PROFINET network engineer, PROFIBUS System Design Engineer and has over 20 years of experience with PROFIBUS, PROFINET, EtherNet/IP, Modbus, and HART installations.

Learn the skills to quickly find, analyze, and isolate Modbus network problems. This course will provide you with the knowledge and skills you need to wire the connectors, test the cables, and setup basic equipment. You will also get hands-on experience with the latest Modbus troubleshooting tools.

Upon completion of this course, the student shall be able to:

  • Configure a Modbus RTU, Modbus ASCII, or Modbus TCP device
  • Understand how the network functions
  • Troubleshoot common and uncommon problems
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