Diagnostic Functions; Status Bits; I/O Diagnostic Interface; Diagnostic Memory - Festo CPX System Manual

1. Overview of components

Status bits

I/O diagnostic interface

Diagnostic memory

Fieldbus−specific diagnos
tic functions
Festo P.BE−CPX−SYS−EN en 0902e
Information about the module−specific parameters supported
by the module you use can be found in the manual for the
relevant module. Basic information on the different para
meters can be found in Appendix C in this manual.

Diagnostic functions

Extensive diagnostic information can be accessed depending
on the fieldbus used.
Common diagnostic messages (global error messages) are
displayed by means of 8 internal inputs (8 status bits).
With fieldbuses that do not possess extensive diagnostic
functions, the diagnostic information of the CPX terminals is
available via the I/O diagnostic interface. The I/O diagnostic
interface enables bus−independent access to diagnostic in
formation, data and parameters via internal digital I/Os
(16 inputs and 16 outputs).
Faults that occur during operation are entered in a diagnostic
memory. The first or the last 40 entries are saved, as well as
the relevant time measured from the moment the power sup
ply was switched on.
Special diagnostic functions or communication services are
available, depending on the fieldbus used. For example
communication services on:
DPV1 (PROFIBUS)
The PCP channel (Interbus)
SDO access (CANopen)
etc.
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