750-333 - Hardware Diagnostic with siemens

Hello, anyone had experience with the diagnostic of 750-333 Profibus?
I’m working on plant which is running and i cant stop it with tests.
i would like to know if reading the byte showed in the attachment i can understand the status of the module.
i can read the header but other are all on 0 (now are working properly)
0 no error
1 error

many thanks