Modbus Exception: Illegal Data Address

What does 02 hex mean?

This Modbus exception occurs when the master device attempts to read from or write to a data address (register or coil) that is beyond the inverter's valid address range or does not exist. This indicates an incorrect memory address in the Modbus request, which the inverter cannot fulfill.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If Modbus mapping is enabled (P200=01), check the 'Modbus Mapping External Register' (P201 to P210) settings for correct address assignments.

2. 4

   Correct any overlapping external or internal Modbus register addresses if mapping is in use.