Festo CTEU-DN, Description, Functions And Maintenance

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5. Diagnostics
5-13
Festo P.BE-CTEU-DN-OP+MAINT-EN en 1206NH
The table below shows the composition of the diagnostic in-
formation (status byte). Additional information can be found
in the Appendix.
Bit Significance Explanation
0 I-Port Module Error I-port device/module reports diagnostics status
1 I-Port Configuration Error – Connected device/module is not compatible with
I-port
– I-port device/module interchanged during opera-
tion
– I/O data length not reached/exceeded
2 Communication Error I-port communication error during operation, e.g. if
the I-port device/module was unplugged
3 Undervoltage PS Undervoltage in the power supply
4 Undervoltage PL I-port device/module reports undervoltage in the load
supply
5 Overload/Short Circuit Module I-port device/module reports short circuit or overload
6 Overload/Short Circuit I-Port Short circuit or overload at I-port
7 Other Error Other faults:
Tab. 5/7: Explanation on the diagnostic information (significance of I-port status byte –
Festo diagnostic object – Class code 103
d
)
5.4.2 Short circuit/overload
Short circuit or overload monitoring depends on the connec-
ted I-port device: When the I-port device monitors the load
voltage and I-port connection for short circuit and overload,
corresponding error messages are generated and forwarded
to the PLC. On the bus node, the “PS” LED flashes green,
showing a malfunction in the operating and load voltage sup-
ply (
Tab. 5/2).
More extensive information can be found in the product docu-
mentation on the I-port device.