Error Handling - Festo CPX-FB6 Manual

3. Diagnostics and error handling
3.4

Error handling

3-20
The behaviour of the CPX terminal with the following malfunc-
tions is dependent on the configured behaviour of the master
interface and the parametrised Fail Safe setting:
– telegram failure
– master stop
– interruption in the bus cable
Depending on the parametrisation, the outputs (valves and
electric outputs) will be switched off (factory setting),
switched on or retain their status (see CPX system descrip-
tion).
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 normal position
– Double-solenoid valves remain in the current position.
– Mid-position valves go into mid-position (pressurized,
exhausted or closed, depending on valve type).
Festo P.BE-CPX-FB6-EN en 1207c