Festo CPX-FB38, Electronic Manual

Page: 49 / 120

2. Commissioning
2−13
Festo P.BE−CPX−FB38−EN en 0804NH
2.3 Addressing
2.3.1 Basic rules for addressing
The field bus node counts as a module with 0inputs and
0outputs when the status bits and the I/O diagnostic
interface are deactivated.
Note the remarks regarding address assignment in
section 2.2.
The address assignment of the inputs does not depend
on the address assignment of the outputs.
Counting is from left to right, addressing in bytes :
Modules with less than 8 bits occupy 8 bits of address
space, but do not use all this space.
The I/Os of different module types are assigned
separately from each other. Observe the sequence of
addressing: see Tab.2/8.
Please note
If necessary, status bits or an I/O diagnostic interface can
be activated by DIL switch (see Tab.1/2):
If the 8 status bits are activated, they will occupy the
first 16 inputs in the address range (8 used).
If the I/O diagnostic interface is activated, it will occupy
the first 16 inputs and outputs in the address range.