Siemens SIMATIC IM151-1 STANDARD

Interrupt, error, and system messages
4.4 Diagnostics with STEP 7
Interface module IM151-1 STANDARD (6ES7151-1AA06-0AB0)
40 Manual, 07/2015, A5E01075950-AD
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.
For the purpose of this STEP 7 user program, the following is assumed:
● The diagnostic address of the ET 200S is 1022 (3FE
H
).
● The slave diagnostics are to be stored in DB 82: Starting from address 0.0, length = 64
bytes.
● The slave diagnostics consist of a maximum of 64 bytes (IM151-1 STANDARD in DPV0
mode).
STEP 7 user program
STL
Description
CALL SFC 13
REQ
:=TRUE
Read request
LADDR
:=W#16#3FE
Diagnostic address of the ET 200S
RET_VAL
:=MW0
RET_VAL of SFC 13
RECORD
:=P#DB82.DBX 0.0 BYTE 64
Data record for the diagnostics in DB 82
BUSY
:=M2.0
The read process runs through several OB 1 cycles