PROFIBUS DP
5.1 CPU 41x-3 PN/DP as DP master / DP slave
S7-400 Automation System, CPU Specifications
5-8 Manual, 10/2006, 6ES7498-8AA04-8BA0
Analysis of Diagnostic Data in the User Program
The following figure shows you how to evaluate the diagnostic data in the user program.
↓ ↓
↓
CPU 41x
Diagnostic event
OB82 is called
Read out OB82_MDL_ADDR
and
Read out OB82_IO_FLAG
(= input/output module identifier)
Enter bit 0 of the OB82_IO_Flag as
bit 15 in OB82_MDL_ADDR Result:
Diagnostic address
"OB40_MDL_ADDR*"
For the diagnosis of the whole DP slave:
Call SFC 13
Enter the diagnostic address
“OB82_MDL_ADDR*” in the LADDR param-
eter
For the diagnosis of the relevant modules:
Call SFC 51
Enter the diagnostic address
“OB82_MDL_ADDR*” in the INDEX parameter
Enter the ID W#16#00B3 in the SZL_ID
parameter (= diagnostic data of a module)
For the diagnosis of the relevant
components:
Call SFB 54 (in the DPV1 environ-
ment)
MODE= set 1
Diagnostic data are entered in the
TINFO and AINFO parameters.
Figure 5-1 Diagnostics with CPU 41x
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