Diagnosis Via Status Bits Or The I/O Diagnostic Interface; Fieldbus−Independent Diagnostic Modes - Festo CPX System Manual

5. Diagnostics and error handling
5.2

Diagnosis via status bits or the I/O diagnostic interface

Festo P.BE−CPX−SYS−EN en 0902e
The CPX terminal offers the following two modes for diag
nosis, irrespective of the CPX bus node used:
Mode
Status bits
(system status)
I/O diagnostic inter
face (system diagno
sis)
Tab. 5/2: Fieldbus−independent diagnostic modes
Description
The status bits serve for displaying com
mon diagnostic messages (global fault
message). Access to the status bits is
made via 8 internal inputs (see section
5.2.1).
The I/O diagnostic interface is a fieldbus−
independent diagnostic interface.
With this interface, all internal data and
parameters can be read out via 16 internal
inputs and 16 internal outputs (see sec
tion 5.2.2 and Appendix B). All diagnostic
information is then also available even if
the fieldbus protocol used does not offer
any extensive diagnostic functions.
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