Error Handling - Festo CPX-FB32 Manual

3. Diagnostics
3.6

Error handling

Festo P.BE-CPX-FB32-EN en 1111a
With the following malfunctions, 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 the 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
• Ensure that valves and outputs are put into a safe state
if the stated malfunctions occur.
An incorrect status of the valves and outputs can lead to
dangerous situations!
Note
Please observe the following if the outputs are reset in the
event of a PLC stop or fieldbus interruption or malfunction:
– Single-solenoid valves move to the basic position.
– Double-solenoid valves remain in the current position.
– Mid-position valves go into mid-position
(pressurized, exhausted or closed, depending on
valve type).
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