CPU 31x-2 as DP Master/DP Slave and Direct Communication
2-34
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Evaluation in the User Program
Table 2-16 shows you how you can, for example, evaluate the station failure of the
sender in the receiver (see also Table 2-15).
Table 2-16 Evaluation of the Station Failure of the Sender During Direct Communication
In the Sender
In the Receiver
Diagnostic Addresses Example:<FJ>
Master diagnostic address =1023<FJ>
Slave diagnostic address in the master<FJ>
system =1022
Diagnostic address: (Example)
Diagnostic address =444
Station failure The CPU calls OB 86 with the following
information:
OB 86_MDL_ADDR:=444
OB86_EV_CLASS:=B#16#38
(incoming event)
OB86_FLT_ID:=B#16#C4
(failure of a DP station)
Tip: The CPU’s diagnostic data buffer also
contains this information
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