Diagnostic Memory - Festo CPX Series Manual

4. Faults and diagnostics
Parameter
Active fault level
PNU 225
Bit−encoded fault
status PNU 227
Tab. 4/5: Parameters of the diagnostic memory

4.3.2 Diagnostic memory

4−32
Description
In this way the FCT can display the current status of the CMAX in accord
ance with the fault level (section 4.2.3). The most serious current fault is
always responsible for the current fault level.
The bit−encoded error status allows the FCT to indicate the exact status
of an active fault message. The coding is identical to the coding of the
PNU 203 support information. For the description, see section 4.3.3.
The diagnostic memory contains the diagnostic messages of
the last 100 events that occurred. The memory is backed up
in the event of a power failure. If the buffer is full, the oldest
element will be overwritten. When reading, the newest entry
is read first (LIFO principle).
Number (subindex)
1
2
...
100
Tab. 4/6: Structure of the diagnostic memory
Diagnostic memory entry
Newest (last) diagnostic message.
Last but one diagnostic message.
...
Oldest diagnostic message.
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH