Siemens S7-300 - Page 198

Data blocks / error lists
C.4 Error classes
FM 352 electronic cam controller
198 Operating Instructions, 05/2011, A5E01071724-03
No. Meaning Diagnostic
interrupt
Absolute encoder frame error
Cause The frame traffic between FM 352 and the absolute
encoder (SSI) is incorrect or interrupted:
 Encoder cable cut or not plugged in
 Incorrect encoder type
 Encoder incorrectly set (programmable encoders)
 Frame length incorrectly specified
 Encoder returns incorrect values (encoder defective)
 Interference on measuring system cable
 Selected baud rate is too high
Effect
 Cam processing will be deactivated
 Track outputs will be disabled
 The last correct actual value remains unchanged until
the end of the next correct SSI transfer
145
Remedy
 Check the encoder cable
 Check the encoder
 Check the frame traffic between the encoder and
FM 352
Yes
Missing pulses of incremental encoder
Cause
 Encoder monitoring has detected missing pulses
 Number of increments per encoder revolution is
incorrectly entered
 Encoder defective: does not return the defined
number of pulses
 Bad or missing zero marker
 Interference on the encoder cable
Effect
 Cam processing will be deactivated
 Track outputs will be disabled
 Synchronization is canceled
146
Remedy
 Enter the correct number of increments/encoder
revolution
 Check the encoder and its cable
 Comply with shielding and grounding regulations
 Monitoring can be temporarily disabled using the
parameter assignment interface, but at the
responsibility of the operator.
Yes