Festo CPX - Structure of the Status Bits

5. Diagnostics and error handling
5−12
Festo P.BE−CPX−SYS−EN en 0902e
5.2.1 Structure of the status bits
Irrespective of the CPX bus node used, the CPX terminal pro
vides 8status bits for displaying common diagnostic mess
ages (global error messages).
Status bits are configured like inputs. The input addresses,
which are to be assigned to status bits, depend on the field
bus protocol used (see manual for the specific CPX
bus
node).
The status bits supply coded diagnostic information. Bits 0 to
3 specify the module types in which faults have occurred. Bits
4 to 7 specify the type of fault.
Bit
Diagnostic information
with 1−signal
Description
0 Error at valve Module type in which an
error has occurred
1 Error at output
error has occurred
2 Error at input
3 Error in analogue module/
function module or techno
logy module
4 Undervoltage Type of error
5 Short circuit/overload
6 Wire break
7 Other error
Tab.5/3: Structure of the status bits
If all status bits supply a 0−signal, no fault will be registered.