Peripheral Fault (Pf) - Festo CPX-M-FB20 Manual

3. Diagnostics and error handling

3.3.2 Peripheral fault (PF)

Festo P.BE-CPX-FB20/21-EN en 1202a
If a fault is recognized by the valve terminal, a peripheral fault
will be triggered as a common fault message, transmitted to
the module and displayed there.
The causes of peripheral faults can be all the fault messages
of the CPX terminal e.g.:
– Voltage of the valves and electric outputs below the
tolerance.
– Voltage of the valves and electric outputs switched off
(e.g. after EMERGENCY STOP).
– Short circuit in power supply to inputs/sensors.
– Short circuit or overload at digital outputs.
– Further specific fault messages of the CPX terminal.
Further information on fault messages of the CPX terminal
can be found in the CPX system manual.
Mask out voltage fault messages
On delivery from the factory, a peripheral fault can be
triggered by various causes. Voltage faults, however, can be
suppressed with the DIL switch setting on the bus node.
The system is not stopped due to peripheral faults. You can
define the reaction to peripheral faults in the user program.
A peripheral fault is also quitted in the user program.
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