Festo CTEU-CO, Manual, Functions And Maintenance

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2. Diagnosis
2-10
Festo P.BE-CTEU-CO-OP+MAINT-EN en 1101NH
The pre-defined error field as fault memory
If the Emergency Message is transmitted, a compressed form
of the fault information will be saved parallel in the Pre-Defined
Error Field (Index 1003).
Device 1 + 2 DIAG, Error Code
The Pre-defined Error Field serves as fault memory for the last
faults ascertained.
Error Codes
Note
If several Emergency Messages from Tab. 2/7 are present,
only the most recently reported is transmitted to the mas-
ter controller.
Byte 0 Byte 1 Explanation
00 00 No error
20 22 Short circuit diagnostics
20 23 Short circuit at outputs
20 31 Operating voltage too low
20 33 Load voltage too low
00 50 Hardware fault
30 81 Node guarding or Heartbeat error
00 FF Configuration error
FF FF Diagnostic message from I-Port telegram
Tab. 2/7: Bus node Error Codes (as per DS401)