PROFIBUS DP
5.1 CPU 41x-3 PN/DP as DP master / DP slave
S7-400 Automation System, CPU Specifications
5-28 Manual, 10/2006, 6ES7498-8AA04-8BA0
Evaluation in the user program
The following table shows you, for example, how you can evaluate a sender station failure in
the recipient (see also table above).
Table 5-20 Evaluation of the station failure in the sender during direct data exchange
In the sender In the recipient
Diagnostic addresses: (example)
Master diagnostic address=1023
Slave diagnostic address
in the master system=1022
Diagnostic address: (example)
Diagnostic address=444
Station failure
The CPU calls OB86 with the following information,
amongst other things:
• OB86_MDL_ADDR:=444
• OB86_EV_CLASS:=B#16#38
(event entering state)
• OB86_FLT_ID:=B#16#C4
(failure of a DP station)
Tip: This information is also in the diagnostic buffer of
the CPU
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