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Modbus Troubleshooting: No Response, CRC Errors, and Wrong Values — Fixed
Systematic approach to fixing Modbus RTU communication failures — no response, CRC errors, timeout issues, and wrong register values. Field-tested methods.
Monitoring VFDs Remotely via Modbus and 4G: Speed, Current, Faults — All in the Cloud
How to read VFD parameters — output frequency, current, motor RPM, fault codes — over RS485 Modbus RTU and push them to a cloud dashboard over 4G.
Modbus TCP vs Modbus RTU: A Practical Guide for Industrial Engineers
Modbus RTU and Modbus TCP explained without the textbook theory. When to use each, how they differ, and which your application actually needs.
How to Monitor Multiple Energy Meters Over 4G
Step-by-step guide to monitoring multiple energy meters remotely over 4G. RS485 bus setup, register mapping, and cloud dashboard configuration.
RS485 Wiring Best Practices for Industrial Sites
RS485 wiring mistakes that kill Modbus communication — and how to avoid them. Topology, termination, grounding, and cable selection for industrial sites.
Modbus Data Logger: Complete Setup Guide for Industrial Sites
Step-by-step guide to setting up a Modbus data logger on an industrial site. Register mapping, wiring, cloud config, and troubleshooting.
Connecting Modbus Devices to the Cloud Over 4G — Practical Guide with Selec EM2M
Wire a Selec EM2M energy meter to a 4G gateway over RS485, configure registers, and push data to cloud via MQTT. Full tutorial with wiring and debugging.