PROFIBUS DP
7.1 CPU 41x–H as PROFIBUS DP master
S7-400H
94 System Manual, 03/2012, A5E00267695-11
Evaluation in the user program
The table below shows you how to evaluate RUN-STOP changes of the DP slave on the DP
master. Also refer to previous table.
On the DP master On the DP slave (CPU 41x)
Example of diagnostics addresses:
Master diagnostics address=1023
Slave diagnostics address in master
system=1022
Example of diagnostics addresses:
Slave diagnostics address=422
Master diagnostics address=irrelevant
The CPU calls OB 82 with the following information, for example:
OB 82_MDL_ADDR:=1022
OB82_EV_CLASS:=B#16#39
As incoming event
OB82_MDL_DEFECT:=module error
The CPU diagnostic buffer also contains this information
Your user program should also be set up to read the diagnostic
data of the DP slave using SFC 13 "DPNRM_DG".
Use SFB 54 in the DPV1 environment. This outputs the full interrupt
information.
CPU: RUN → STOP
CPU generates a DP slave diagnostics frame.
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