Instruction Manual

C. General information on parametrisation
C−22
Festo P.BE−CPX−SYS−EN en 0902e
Mode of operation
With the CPX terminals the start and end of a fault can be
protocolled in the internal diagnostic memory. The diagnostic
memory contains up to 40entries. In addition to information
on localising the fault, the relevant time point is saved,
measured from the moment the power supply is switched on.
A diagnostic entry
consists of 10bytes. The first five bytes
contain information on the time point. The last five bytes con
tain information on the fault (see section B.2.5).
With the aid of the function number, entries in the diagnostic
memory can be read out via the I/O diagnostic interface irre
spective of the fieldbus protocol
used. The various fieldbus
protocols provide, where applicable, further possibilities for
reading out and configuring the CPX diagnostic memory (see
the manual for the specific CPX bus node).