Siemens Simatic ET 200S Operating Instructions Manual page 170

Alarm, error and system messages
8.1 Alarm, error and system messages on PROFIBUS DP
Automation system with DP
master
only for S7-400 from V3.0 and CPU 318 from V3.0
1
Example of reading out S7 diagnostics using SFC 13 "DP NRM_DG"
Here, you will find an example of how to use SFC 13 to read out the slave diagnostics for a
DP slave in the STEP 7 user program.
The following assumptions apply to this STEP 7 user program:
• The diagnostic address of the ET 200S is 1022 (3FE
• The slave diagnostic information is to be stored in DB 82: from address 0.0, length
• The slave diagnostics consist of a maximum 64 bytes (IM151-1 STANDARD in DPV0
STEP 7 user program
STL
CALL SFC 13
REQ :=TRUE
LADDR :=W#16#3FE
RET_VAL :=MW0
RECORD :=P#DB82.DBX 0.0 BYTE 64
BUSY :=M2.0
8-22
STEP 7
Block or tab in
SFB 54 "RALRM"
1
64 bytes.
mode).
Application
Receiving interrupts from the
interrupt OBs
Explanation
Read request
Diagnostic address of the ET 200S
RET_VAL of SFC 13
Data record for the diagnostic information in DB82
The read process iterates through several OB 1 cycles
Reference
Online Help in
SFB see
STEP 7 (system
functions/system function
blocks)
).
H
Operating Instructions, 12/2005, A5E00515771-03
ET 200S