Festo CPX-FB38, Electronic Manual

Page: 108 / 120

3. Diagnosis
3−18
Festo P.BE−CPX−FB38−EN en 0804NH
3.5.2 Fail safe behaviour (Fail safe settings)
The reaction of the CPX terminal for the following errors is
dependent on the configured reaction of the controller (of the
Master), i.e. of the PLC, the SPS, the IPC or the application
program and the parameterised Fail safe setting:
stop of the controller (of the master)
network interruption
telegram elimination.
Depending on the parameterisation, the outputs (valves and
electric outputs) will be switched off (factory setting),
switched on or retain their status.
Further information about the Fails safe setting can be found
in the section 2.6.1 the CPX system manual P.BE−CPX−SYS−...
You can set two types of fault reactions of the controller
(or the application program):
Hard fault reaction:
The controller switches to the operating mode STOP" or
pre−operational when a fault occurs.
Soft fault reaction:
The controller switches to the operating mode RUN"
orsafe−operational (or possibly operational) when a fault
occurs.