Product manual

TAC Xenta Server – Gateway, Technical Manual B Protocols
Schneider Electric Buildings AB, June 2011 147 (184)
04-00124-06-en
B.4.2 BACnet IP Interface
One or more BACnet IP interface drivers are added into the network
pane of XBuilder, as shown for the single IPSim example network in the
following screenshot.
Interface Properties
• IP Address – Sets the IP address that uniquely identifies the
server device on the network. The selected address must be
directly accessible by the Xenta 913 client through its 10Base-T
Ethernet connection. If more than one BACnet IP device exists on
a network then a interface driver instance must be added for each
one that is to be accessed by the Xenta 913.
• BACnet Port – Can normally be left as the default of 47808,
which is the value specified in the BACnet IP protocol standard.
However, in very rare cases the BACnet IP port number may be
reassigned on a sub-set of devices on the network, in which case
the new port number must be entered into the applicable inter-
face’s BACnet Port property.
• Write Priority – Allows an optional write priority to be entered
(3–16, with 3 being the highest priority and 16 the lowest). Can be
used to assign the gateway application’s priority versus other
applications should they also write a value to a single object. Nor-
mally left at the default write priority of 12.
The entered priority is sent with all object value write requests. If the
target object is not commendable then the priority is ignored and the last
written value is applied. However, if the target object is commendable
then the highest priority written value is applied, while lower priority
values are ignored.