Festo CPX-FB23, Electronic Manual

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3. Diagnosis and error treatment
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Festo P.BE−CPX−FB23−EN en 0308NH
3.4 Diagnosis via CC−Link
The CPX terminal enables diagnosis via the field bus. The
following diagnostic possibilities are supported here:
status bits (system status)
I/O diagnostic interface (system diagnosis).
3.4.1 Status bits
The status bits serve for displaying common diagnostic
messages (global fault message).
These status bits are treated like inputs and are transmitted
to the master with the other inputs. There they can be interro
gated, linked and processed as normal" inputs.
The status bits always occupy the first 8 input bits in the word
range of station 1 (see section 2.1.2).
Please note
In order to use the I/O diagnostic interface, the system
diagnosis must be activated with the DIL switch on the
field bus node.
The information from the status bits is only available pro
viding interrogation of the I/O diagnostic interface is not
active (control bit has 0−signal, see CPX system manual).