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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

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