Festo CPX-CTEL4-M12-5POL Manual page 100

4. Diagnostics and error handling
4-18
I-port Fixed I/O length
4 bytes
I-port Byte 0
Byte 1
Byte 2
Byte 3
X
X
X
X
Fig. 4/4: Device address space greater than reserved
address space
– An output device is recognised, but the CTEL master
module is configured for operation as a pure input
module.
The system can continue to be operated. Corresponding
to the setting for the relevant I-port, either an I-port con-
figuration error is reported (with setting "Expect device")
or no error message is issued (with setting "Use existing
device").
The reserved input data address space is completely as-
signed; all input bits are set to the value "0".
Write access to the outputs of the connected device are
not possible.
– An input device is recognised, but the CTEL master
module is configured for operation as a pure output
module.
The system can be operated again. Corresponding to the
setting for the relevant I-port, either an I-port configura-
tion error is reported (with setting "Expect device") or no
error message is issued (with setting "Use existing
device").
The reserved output data address space is completely
assigned. All write access to the output bits is ignored.
Changes in status of the device inputs are also ignored.
Device:
8 bytes
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Festo P.BE-CPX-CTEL-EN en 1205NH