Fault Treatment - Festo CPX-FB11 Manual

3. Diagnosis and error treatment
3.6

Fault treatment

Festo P.BE−CPX−FB11−EN en 0306a
With the following faults, the reaction of the CPX terminal
depends on the configured reaction of the master module
and on the parameterised Fail safe setting:
Telegram failure
The master has stopped
Interruption in bus cable
Depending on the parameterisation, the outputs (valves and
electric outputs) will be switched off (factory setting),
switched on or retain their status (see CPX system manual).
Warning
Make sure that valves and outputs are put into a safe
·
state when the faults named occur.
An incorrect status of the valves and outputs may lead to
dangerous situations.
Please note
Please observe the following if the outputs are reset in the
event of a PLC stop, field bus interruption or field bus 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: pressurised, exhausted or blocked).
3−21