Question

Hi,

when I test modbus master/slave with the RUTX11 (Request Configuration Testing), I request hostname (ASCII, Read Holding Register(3), First register 24, register count 16) for instance and the result is like this:

"FP-GW\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

Device is RUTX11, FW: RUTX_R_00.02.06.1

Thank you

Brice

Answer 1

Hi,

This is normal as \x00\ is an alias for null definition, so if the hostname doesn't use the whole set of registers, empty registers are filled with nulls, in a result, you're getting \x00\ values after your hostname repeating.

This will not change unless there will be a requirement from someone to develop a different data type, but for now, you can only hope this may change in the future.

EB.