Siemens SIMATIC S7-300 Manual page 290

Troubleshooting
11.3 Error lists
Note
In the following tables, please note:
The module response described under "Effect" refers to the error–specific
module response. The error response described in Table 11-2 occurs in addi-
tion.
11.3.1 Diagnostic interrupts
Overview
The diagnostic interrupts are listed according to error class in Tables 11-4,
11-5.
Table 11-4 Diagnostic interrupt
Byte.
Bit
0.1 Internal errors
2.1 Communication disturbance
(8031) (8031)
Cause MPI/K-bus communication fault caused by unknown event
Effect
Elimina- Check connection
tion
Check programming device/CPU
Switch module on/off
Replace module
2.3
Internal time monitoring circuit (Watchdog)
(8033) (8033)
Cause Pronounced noise conditions on the FM 354
Errors in the FM 354
Effect Deactivate entire FM 354
LED indicators:
Elimina- If this manual is observed, the errors should not occur
tion
However, should this still be the case, please consult the responsible sales
department. When doing so, it is vitally important to also report the exact
circumstances leading to the error.
Replace the FM 354
Note: (xxxx) value = Hexadecimal notation in diagnostic buffer
11-10
Error message,
error analysis and elimination
Error response: "Everything Off", as in Table 11-2
SF: On
DIAG: Flashing cycle
Message/
Display
SF SF
DC5V
DIAG DIAG
FM 354 Servo Drive Positioning Module