Modbus

1 article tagged "Modbus" on the Serial Terminal blog.

This collection brings together every Modbus article published on the Serial Terminal blog. "Modbus RTU Over Serial: How It Works on RS-485" — each one is a practical, hands-on guide written for engineers and system integrators who work with Serial Terminal in real industrial deployments. Whether you are choosing between protocols, troubleshooting a connection, or planning an integration, these articles cover the concepts, the trade-offs, and the step-by-step details you need.

1 article

August 11, 2026·Guide

Modbus RTU Over Serial: How It Works on RS-485

A byte-level breakdown of Modbus RTU on RS-485: frame structure, CRC-16 with polynomial 0xA001, function codes, 3.5-character inter-frame timing, and a worked FC03 request/response you can read off the wire.

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