Siemens SIMATIC S7-400 Reference Manual page 54

Structure of a CPU 41x
Reading Out the Diagnosis with STEP 7
Table 1-8 Reading Out the Diagnosis with STEP 7
DP Master Block or Tab in
STEP 7
CPU 41x DP slave diagnostics
tab
SFC 13
"DPNRM_DG"
SFC 59 "RD_REC"
SFC 51 "RDSYSST"
SFB 52 "RDREC"
SFB 54 "RALRM"
SFC 103
"DP_TOPOL"
1-42
Application
To display the slave diagnosis
as plain text at the STEP 7
user interface
To read out the slave
diagnosis
(store in the data area of the
user program))
To read out data records of
the S7 diagnosis (store in the
data area of the user
program))
To read out SSL sublists. Call
SFC 51 in the diagnostic
interrupt using the SSL ID
W#16#00B3 and read out the
SSL of the slave CPU.
For DPV1 slaves:
To read out data records of
the S7 diagnosis (store 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.
Automation System S7-400 CPU Specifications
Refer To...
See the section on hardware
diagnostics in the STEP 7 online
help system and the STEP 7 user
guide STEP 7-STEP 7
For the structure of CPU 41x, see
Section 1.11.6; SFC see
Reference Manual System and
Standard Functions
For the structure for other slaves,
see respective sections
Reference Manual System and
Standard Functions
A5E00165965-01