Manual Configuration" Operating Mode - Festo CPX-CTEL4-M12-5POL Manual

4. Diagnostics and error handling

4.7.2 "Manual configuration" operating mode

4-16
The "I-port configuration error" is only displayed if the power
supply of the CPX terminal has not been interrupted. Other-
wise, when the system is started, the connected device is
recognised as the setpoint configuration and no error is re-
ported.
During operation with manual configuration, the I-ports are
checked only for the I/Os and I/O lengths that are set and
assigned in the CPX system.
If the configuration parameter of the corresponding I-port is
set to "Use existing device", no error is issued.
If the configuration parameter of the corresponding I-port is
set to "Expect device", the CTEL master module issues the
error "I-port device missing/failed" (CPX error number 57)
when communication with the device is interrupted.
If input bytes are assigned for the separated module in the
CPX system, these are automatically set to "0".
For existing output bytes, their last known status is saved.
After an interruption is determined, the relevant I-port is
queried cyclically and checked for a connection-capable
device.
If a device is recognised, the following procedures are pos-
sible:
The recognised device agrees with the manual configur-
–
ation (I/Os and I/O lengths).
The system can continue to be operated without limita-
tion.
If the I/O length of the recognised device is less than the
length established in manual configuration, the I/O bytes
used are assigned to the "lower end" of the reserved ad-
dress space in the CPX system. The unassigned bytes at
the "upper end" remain unused.
Festo P.BE-CPX-CTEL-EN en 1205NH