Siemens S7-300 - Page 197

Data blocks / error lists
C.4 Error classes
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
197
No. Meaning Diagnostic
interrupt
Internal module power supply failed
Cause 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.
52
Remedy Replace the FM 352
Yes
Hardware interrupt lost
Cause A hardware interrupt event detected by FM 352 cannot be
reported, because the same event has not yet been
processed by the user program/CPU.
Effect
 Cam processing will be deactivated
 Track outputs will be disabled
 With incremental encoders, synchronization is
canceled
70
Remedy
 Link OB40 into the user program
 Check the bus connection of the module
 Deactivate hardware interrupt
 Adapt your hardware and software to suit your
process requirements (for example, faster CPU,
optimize user program).
Yes
Encoder wire break
Cause
 Encoder cable cut or not plugged in
 Encoder has no transverse signals
 Incorrect pin assignment
 Cable length too long
 Encoder signals short-circuited
Effect
 Cam processing will be deactivated
 Track outputs will be disabled
 With incremental encoders, synchronization is
canceled
144
Remedy
 Check the encoder cable
 Keep within encoder specifications
 Monitoring can be temporarily disabled using the
parameter assignment interface, but at the
responsibility of the operator.
 Keep to the module's technical data
Yes