Festo IFB05-03 Manual page 72

4. Commissioning
4−10
Due to the 4−bit orientated addressing of the modular
valve terminal, rounding up to the full four bits is always
made on the last valve location (if the fitting does not al
ready use the full four bits). This means that two ad
dresses cannot perhaps be used (see addresses 14, 15).
Additional notes on valve terminals without I/O modules
If only valves are used, the address assignment will always be
as described in the section Basic rules for addressing".
Please note
Maximum 26 valve solenoid coils can be addressed.
The last two locations on the valve side are not rounded
up.
Valve terminals without input modules do not require a
configuration for the inputs. The status bits are not
therefore available.
Additional instructions for valve terminals without valves
If only electric I/Os are used, the address assignment will
always be as described in the section Basic rules for addres
sing".
Please note
Counting begins immediately to the left of the node.
The last two locations on the valve side are not rounded
up.
The maximum possible amount of equipment which can
be fitted on the valve terminal is limited by the addres
sing limits of the relevant field bus protocol and the
mechanical limits of the valve terminal (max. 96 inputs
or 48 outputs).
Festo P.BE−VIFB5−03−EN en 0503e