Festo CPX-FB23, Electronic Manual

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3. Diagnosis and error treatment
3−17
Festo P.BE−CPX−FB23−EN en 0308NH
3.5 Fault treatment
The reaction of the CPX terminal to the following faults de
pends on the HOLD/CLEAR setting undertaken with the DIL
switches:
communication interruption
communication time−out.
Depending on the setting, the outputs (valves and electric
outputs) will be switched off (factory setting) or retain their
status (see section 2.3.1).
Warning
·
Make sure 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.
Please note
Please note the following if the outputs are reset after
master 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 (depend
ing on valve type: pressurized, exhausted or blocked).