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Addressing

1 article tagged "Addressing" on the Modbus Poll blog.

This collection brings together every Addressing article published on the Modbus Poll blog. "Modbus Addressing Explained: PLC Address vs Protocol Address (No More Off-By-One)" — each one is a practical, hands-on guide written for engineers and system integrators who work with Modbus Poll 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
July 21, 2026·Reference

Modbus Addressing Explained: PLC Address vs Protocol Address (No More Off-By-One)

Why Modbus holding register 40001 is protocol address 0. The PLC address vs protocol address off-by-one confusion, the four address ranges, and how to convert between them.

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