Diagnosis Via Status Bits - Festo CPX-FB11 Manual

3. Diagnosis and error treatment
3.3

Diagnosis via status bits

Festo P.BE−CPX−FB11−EN en 0306a
Status bits are internal inputs (1 input byte) which serve for
displaying common diagnostic messages (global fault mess
ages). The status bits are transmitted via the communication
type Strobed I/O".
Please note
If status bits are to be transmitted via a Polled" or
Change of State" connection, you must set the DIL
switches on the field bus node accordingly (see Tab. 1/3).
If all status bits supply a 0−signal, no fault will be registered.
The following table shows the diagnostic information when
there is a 1−signal:
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
4 Undervoltage
5 Short circuit/overload
6 Cable fracture
7 Other faults
Tab. 3/3: Overview of status bits
If various faults occur simultaneously on different types of
modules, they cannot be assigned by means of the status
bits. Faults can be clearly defined via the I/O diagnostic inter
face of by diagnosis via DeviceNet access.
Description
Module type with which a
fault has occurred. fault has occurred
Type of fault
3−13