Error processing function code 3

[mehh]

When I try and connect via modbus it keeps on showing “Error processing function code 3”.

This is the full error if I SSH in "2025-01-01 20:31:35.888948500 ERROR “Error processing function code 3, unit id 247, start address 865, quantity 2, src 192.168.0.10: Error finding service with device type system at device instance 256”

I can not connect at all and this is very confusing because unit id 247 is “247 256 CCGX VE.Direct 1 port (ttyO0)” when I looked on the modbus spreedsheet

[Ludo]

Maybe you could specify what you are trying to connect to whatever ?

[mehh]

home assistant with the victron modbus hacs plugin. I have already tried using the build in modbus but it still gives the same error. Image is attached with the errors I’m getting the log file is so long that I have to scroll up like 5 or 8 times