Fault Treatment (Fail Safe") - Festo CPX-FB13 Manual

3. Diagnosis
3.6

Fault treatment (Fail safe")

Parameterisation
Festo P.BE−CPX−FB13−E N en 0811c
The reaction of the CPX terminal to the following faults
depends on the configured reaction of the master module
and the parameterised fail−safe setting:
Telegram failure
The master has stopped
Interruption in the bus cable
Depending on parameterisation, the outputs (valves and
electric outputs) will be switched off (factory setting),
switched on or retain their status.
Further information about the fail−safe setting can be found in
the CPX system manual P.BE−CPX−SYS−...
Warning
Ensure that valves and outputs are put into a safe state
·
if the faults named occur.
An incorrect status of the valves and outputs can lead to
dangerous situations!
Note
Please note the following if the outputs are reset after PLC
stop, field bus interruption or fault:
Single−solenoid valves move to the basic position.
Double−solenoid valves remain in the current position.
Mid−position valves move to the mid−position
(depending on valve type: vented, purged or blocked).
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