11-1
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Troubleshooting
The FM 453 provides diagnostics for the following:
S
I/Os
S
Module processes
This “Troubleshooting” chapter describes the different types of errors, their
cause, effect and elimination.
The FM 453 distinguishes between
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.
Diagnos-
tic
backup
error his-
tory
FM 453
CPU
callup in user
program
User DB
MPI
OP
PG (STEP 7)
P bus
K bus
SSL
Diagnostic
interrupt
“binary” diagnostic
interrupt informa-
tion
RAM
DB-SS
Other
errors, op-
erating er-
rors
External
channel er-
rors
External er-
rors
OB 1
OB 82
Call SFC 52
FC RD_COM
.
Diag-
nostic
backup
of CPU
Write diagnost.interrupt info
..
STEP 7-Info
FM 453 Parameterize
SSL
– System Status List
SFC
– System Function
DB-SS – Data block for status messages
Internal
errors
FC MODE_WR
FC DIAG_RD
Other
error message
Fig. 11-1
Overview of Diagnostics/Errors
Overview
Error Localization
11
Summary of Contents for SIMATIC FM 453
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