Siemens S7-300 - Page 196

Data blocks / error lists
C.4 Error classes
FM 352 electronic cam controller
196 Operating Instructions, 05/2011, A5E01071724-03
Class 15: Messages
No. Meaning Diagnostic
interrupt
Start of parameter assignment 1
Cause The module has detected a parameter assignment via a
system data block.
No
End of parameter assignment 2
Cause The module has processed the parameter assignment via
a system data block error-free.
No
Class 128: Diagnostic errors
No. Meaning Diagnostic
interrupt
External auxiliary voltage missing
Cause External auxiliary 24 V voltage is not connected or has
failed, front connector missing, short circuit (e.g., at
connected encoder)
Effect See chapter "Reaction of FM 352 to errors with
diagnostics interrupt (Page 148)".
 Cam processing will be deactivated
 Track outputs will be disabled
 With incremental encoders, synchronization is
canceled
 The FM 352 has not had parameters assigned
(checkback signal PARA = 0).
4
Remedy Make sure that the 24 V connection is correct
(
If the 24 V
connection is correct, then the module is defective.)
Yes
Watchdog expired
Cause
 Strong interference on the FM 352
 Error in the FM 352
Effect
 Module is reset
 Provided that after resetting the module, no module
defect is detected, the module is ready for operation
again.
 The module signals the expired WATCHDOG with
"incoming" and "outgoing"
51
Remedy
 Eliminate the interference
 Contact the relevant sales department who will
require details of the circumstances leading to the
error.
 Replace the FM 352
Yes