Hello,

i struggle with diagnostic of profibus network behind PN/DP couplers.

In my network i use 3 PN/DP couplers (IE/PB LINK PN IO 6GK1 411-5AB10) as DP master. On profibus we have sets of Auma valves. PLC isCPU 1511-1 PN 6ES7 511-1AK02-0AB0. (Tia Portal v18)

For profinet we use Siemens functions (FC2083, FC2086, etc.) to diagnose io system state. PN/DP couplers simulate profinet Device Number, but in DiagnosticData DB, which is filled by DiagStartupIoSystem (FB2001) in Startup OB, i can see slaves only the couplers. Nothing behind them. 

Is there any option, how to diagnose these valves communication status?

Thank you for help.

PS: I asked Siemens Czech Automation department, and they told me, that they have no experience with this.

Exactly, the coupler have option to run as "Network gatewy in standard mode" (for just profinet/profibus data exchange), or as "Network gateway as PROFINET IO proxy", which should allow access to PB slaves as IO device...(written in help)...but no luck...