Diagnosis Via Status Bits Or The I/O Diagnostic Interface - Festo CPX Electronic Manual

5. Diagnosis and error treatment
5.2

Diagnosis via status bits or the I/O diagnostic interface

Festo P.BE−CPX−SYS−EN en 0503b
The CPX terminal offers the following two modes for diag
nosis, irrespective of the field bus node used:
Mode
Status bits
(system status)
I/O diagnostic
interface (system
diagnosis)
Tab. 5/6: Field bus independent diagnostic modes
Description
The status bits serve for displaying com
mon diagnostic messages (global error
messages). Access to the status bits is
made via 8 internal inputs (see section
5.2.1).
The I/O diagnostic interface is a bus−inde
pendent diagnostic interface.
With this interface, all internal data and
parameters can be read out via 16 internal
inputs and 16 internal outputs. All diag
nostic information is then also available
even if the field bus protocol used does
not offer any extensive diagnostic func
tions (see section 5.2.2).
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