Modbus troubleshooting and maintenance


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.

Course content:

  • 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 must bring a laptop or tablet which can read a USB drive.
  • Attendees will receive a support USB drive with an electronic version of the materials plus key PI documents.
  • Attendees will receive a certificate of participation
  • Class size is limited to a maximum of 8 people

Course duration:

This course requires 7.5 hours of instruction which includes two 15 minute breaks and one 30 minute lunch break.

Cost and Registration:

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

October 17, 2023 – Peterborough, Ontario

October 20, 2023 – Online

June 20, 2024 – Online

June 24, 2024 – Online 

On-demand, online or in-person courses available on request

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.

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