Siemens SIMATIC S7-400 Manual page 81

Triggering Detection of the Bus Topology in a DP Master System with the SFC103 "DP_TOPOL"
The diagnostic repeater is available to improve the ability to locate faulty modules or an
interruption on the DP cable when failures occur in ongoing operation. This module operates
as a slave and can identify the topology of a DP chain and record any faults originating from
it.
You can use SFC103 "DP_TOPOL" to trigger the identification of the bus topology of a DP
master system by the diagnostic repeater. For information on SFC103, refer to the
corresponding online help and to the
diagnostic repeater is described in the manual
Order Number 6ES7972-0AB00-8BA0.
Reading Out Diagnostic Data with
Table 5-3 Reading out the diagnostics with STEP 7
DP master Block or tab in
CPU 41x "DP Slave Diagnostics"
tab
SFC13 "DPNRM_DG"
SFC59 "RD_REC"
SFC 51 "RDSYSST"
SFB 52 "RDREC"
SFB 54 "RALRM"
SFC 103
"DP_TOPOL"
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
STEP 7
STEP 7
Application
Show slave diagnosis in clear text
STEP 7
on the
Reading out slave diagnostics
(store in data area of the user
program)
Reading the data records of S7
diagnostics (stored in the data area
of the user program)
To read out partial SSL lists. Call
SFC51 in the diagnostic interrupt
using the SSL ID W#16#00B3 and
read out the SSL of the slave CPU.
For DPV1 slaves
Reading the data records of S7
diagnostics (stored in the data area
of the user program)
For DPV1 slaves:
To read out interrupt information
within the associated interrupt OB
Triggers detection of the bus
topology of a DP master system
with diagnostic repeaters installed
there.
5.1 CPU 41x-3 PN/DP as DP master / DP slave
System and Standard Functions
Diagnostic Repeater for PROFIBUS DP
See the section on hardware
interface diagnostics in the
system and in the
STEP 7
SFC, see
300/400, System and Standard
Functions
structure of other slaves, refer to their
descriptions.
System Software for S7-300/400,
System and Standard Functions
reference manual.
PROFIBUS DP
manual. The
Reference
STEP 7
online help
Programming with
manual
System Software for S7-
reference manual. For the
,
5-7