5
Diagnostics
Festo – P.BE-CPX-FB37-EN – 1406NH – English
75
Composition of the emergency message – CPX error number (byte 5)
Bit
Meaning
Explanation
0 … 7
CPX error number
CPX error number (
CPX system description in
chapter “Diagnostics and error handling”.)
Tab. 5.21 Manufacturer status register – CPX error number
Composition of the emergency message – additional error information (byte 7)
Bit
Meaning
Explanation
0 … 7
Additional information on the
fault
e.g.
–
Node ID with Heart Beat error (which slave has
caused the Time out?)
–
Channel number of the first channel with fault
Tab. 5.22 Manufacturer status register – CPX error number (byte 7)
5.5.5
Error characteristics (fail-safe mode)
The reaction of the CPX terminal to the following malfunctions is dependent on the parameterised fail-
safe setting and the (configured) reaction of the controller, i.e. of the PLC, the IPC or the user program:
–
Stop of the controller (of the master)
–
Network interruption
–
Telegram failure
Depending on the parameterisation, the outputs (valves and electrical outputs) will be:
–
switched off (output signal reset, in the case of analogue outputs to 0; factory setting)
–
switched on (output signal set, in the case of analogue outputs to the parameterised value)
–
kept in the same state (“freezing” of output signal)
Additional information about the fail-safe setting can be found in section 4.7.2 and the
CPX system description (P.BE-CPX-SYS-...).
You can define two types of error reaction for the controller (or the application program):
–
Hard error reaction:
The controller switches to the “STOP” or pre-operational mode if an error occurs.
–
Soft error reaction:
The controller remains in the “RUN” or safe-operational (or, if relevant, the operational) mode if an
error occurs.
