Siemens SIMATIC S7-400 Manual page 84

PROFIBUS DP
5.1 CPU 41x-3 PN/DP as DP master / DP slave
Evaluation in the User Program
The following table shows you how, for example, you can evaluate RUN-STOP transitions of
the DP slave in the DP master (see also table "Event detection of the CPUs 41x as DP
master").
Table 5-6
Diagnostic addresses: (example)
Master diagnostic address=1023
Slave diagnostic address
in the master system=1022
The CPU calls OB82 with the following
information, amongst other things:
Tip: The CPU diagnostic buffer also
contains this information
You should also program the SFC
"DPNRM_DG" in the user program to read
out the DP slave diagnostic data.
Use the SFB 54 in the DPV1 environment. It
outputs the interrupt information in its
entirety.
5-10
Evaluation of RUN-STOP transitions of the DP slave in the DP master
In the DP master
OB82_MDL_ADDR:=102
•
2
OB82_EV_CLASS:=B#1
•
6#39 (incoming event)
OB82_MDL_DEFECT:=
•
module malfunction
In the DP slave (CPU 41x)
Diagnostic addresses: (example)
Slave diagnostic address=422
Master diagnostic address=not relevant
CPU: RUN → STOP
CPU generates a DP slave diagnostic
frame.
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0