Overview Of Diagnostics/Errors - Siemens SIMATIC S7-300 Manual

Troubleshooting
Overview The FM 354 provides diagnostics for the following:
This chapter "Troubleshooting" describes the different types of errors, their
cause, effect and elimination.
Error localization
The FM 354 distinguishes between
In the event of diagnostic interrupt, STATUS LEDs light up in addition.
CPU
RAM
OB 82
Call SFC 52
Diag-
Write diagnostic interrupt infor–
nostic
mation
backup
FC DIAG_RD
of CPU
OB 1
FC MODE_WR
FC RD_COM
. .
.
User DB
MPI
Parameterize FM 354
PG (STEP 7)
Fig. 11-1

Overview of diagnostics/errors

FM 354 Servo Drive Positioning Module
I/Os
Module processes
Errors which trigger a diagnostic interrupt in the CPU, and
Errors which the module reports by way of checkback messages.
callup in user
program
OP
STEP 7-Info
FM 354
Diagnostic
interrupt
"binary" diag-
nostic inter-
P bus
rupt informa-
tion
Other
error message
SSL
Diagnos-
tic backup
error his-
tory
DB-SS
K bus
SSL – System Status List
SFC – System Function
DB-SS – Data block for status messages
11
External
channel er-
rors
External
errors
Internal
errors
Other er-
rors, oper-
ating er-
rors
11-1