Structure Of The Status Bits - Festo CPX Electronic Manual

5. Diagnosis and error treatment

5.2.1 Structure of the status bits

5−20
Irrespective of the field 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 CPX field 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
0 Fault at valve
1 Fault at output
2 Fault at input
3 Fault in analogue module/ function
module or technology module
4 Undervoltage
5 Short circuit/overload
6 Wire fracture
7 Other faults
Tab. 5/7: Structure of the status bits
If all status bits supply a 0−signal, no fault will be registered.
Description
Module type on
which a fault has which a fault has
occurred.
Type of fault
Festo P.BE−CPX−SYS−EN en 0503b