Festo CPX-FB6 Electronic Manual page 74

2. Commissioning
Fig. 2/19: Modification of the I/O assignment (byte swap) example for Standard mode"
2−36
If necessary, swap the high byte and the low byte (byte
swap).
Please note
In order to correct the byte assignment in the Siemens and
Standard modes, it will suffice to assign the appropriate
I/O address to each byte.
Individual I/O assignment at bit level is only necessary in
rare cases.
The following dialogue window shows the entries required for
swapping the assignment of the high byte and the low byte
(example: byte swap for Standard mode").
Festo P.BE−CPX−FB6−EN en 0402b