Siemens SIMATIC FM 353 Manual page 304

Troubleshooting
Error localization
The FM 353 distinguishes according to the following criteria:
S Errors which trigger a diagnostic interrupt in the CPU, and
S Errors which the module reports by way of checkback messages.
In the event of diagnostic interrupt, STATUS LEDs light up in addition.
CPU
RAM
OB 82
call SFC 52
Diagn.
Write diagn. interrupt information
buffer of
the CPU
POS_DIAG
OB 1
POS_CTRL
User DB
MPI
Parameterize FM353
PG (STEP 7)
Fig. 11-1 Overview of diagnostics/errors
Error evaluation by software
The following manuals describe how to include diagnostics-capable modules in
your user program, and how to evaluate the diagnostic messages:
S Programming manual System Software for S7-300/400; Program Design
(OB Types, Diagnostic Interrupt OB 82)
S Reference manual System Software for S7-300/400; System and Standard
Functions
A basic description of the diagnostic system of the S7-300 can be found in the user
manual Standard Software for S7 and M7, STEP 7.
11-2
Callup in
user pro-
gram
.
.
.
OP
STEP 7-Info
FM 353
Diag-
nostic
inter-
rupt
"Binary" diagn.
interrupt infor-
P Bus
mation
Other error mes-
sage
SSL
Diagn.
backup
error his-
tory
DB-SS
K Bus
SSL − System status list
SFC − System function
DB-SS − Data block for status signals
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
External
channel
errors
External
errors
Internal
errors
Other er-
rors, op-
erator
control
errors