Invalid Modbus Address

What does 2 mean?

The Modbus request attempted to access a bit or word address that does not exist in the slave device's memory map. This means the master is querying or writing to an unsupported register location. Continuous invalid address attempts will lead to communication errors and prevent proper data exchange or control.

Complete Troubleshooting Guide

1. 1

   Cross-reference the requested Modbus address with the slave device's Modbus register map in its documentation.

2. 2

   Correct the Modbus address in the master device's configuration to point to a valid register or coil.

3. 3

   Ensure the correct addressing scheme (e.g., 0-based vs 1-based) is being used by the master.