User Manual

Network architecture
LonWorks architecture (ALN)
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router. The router can be configured either via XWP or the integrated web
server.
BACnet address
Every BACnet device in the BACnet internetwork can be accessed via its
BACnet address.
The BACnet address is defined by the BACnet standard and comprises the
following elements:
Designation Description
Network number Network number of the BACnet network in which the device is located. The network number is
only parameterized on devices with BACnet router functionality (including half router) and is
implicitly valid for all BACnet devices in the BACnet network.
BACnet MAC address Address specific to the transport protocol. This address is written to the device in the
commissioning phase.
BACnet MAC address for:
LonTalk: 2 octets, subnet ID und node ID
IP: 6 octets, IP address and UDP port
IPv6: 3 octets as virtual MAC address (VMAC)
MS/TP: 1 octet, MAC address (master 0-127, slave 0-
254, broadcast 255)
Each BACnet device has a device address. This address is written to the device
during the network commissioning process. The BACnet device address is
unique within the BACnet internetwork. The term BACnet device address is an
in-house term rather than an official BACnet term.
Designation Description
Device ID Object identifier of the BACnet device object. The device ID is unique within the BACnet
internetwork.
Device name The object name of the BACnet device object. The device name is unique within the BACnet
internetwork.
For information about the direct addressing of BACnet references to objects in
other networks and media, see
Desigo Ethernet, TCP/IP, MS/TP and BACnet
(CM110666).
14.2 LonWorks architecture (ALN)
With the LonWorks-based communication protocol complete networks made up
of interoperable products can be created. The protocol conforms to ISO/IEC
14908 (worldwide), EN 14908 (Europe), ANSI/CEA-709/852 (U.S.) and is also
standardized in China. See www.lonmark.org.
LonWorks is suited for use with different types of transmission media, such as
twisted pair cables, power line, RF, fiber optics or IP (TCP/IP and UDP/IP) It
supports straightforward installation with different cabling topologies (e.g., star
or line). The connection of objects via bindings (e.g., standard network
variables (SNVTs), standard configuration properties (SCPTs)) can be defined
at the project engineering stage or can be adapted in the field.
Structure
The following figure shows the structure of a Lon network in the FLN
BACnet device address