User Manual

Network architecture
BACnet architecture (MLN & ALN)
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BACnet directly over ethernet, ZigBee or ARCnet is not supported.
Application layer
The BACnet application layer defines services, objects and their characteristics.
From the network viewpoint, the Device object is important. The object ID and
the object name must be unique within the BACnet internetwork.
The Device ID is the object ID of the BACnet device object.
The device ID is divided into the following categories:
Category Device ID Description
Object type Object instance
2 bit 10 bit 10 bit
Unconfigured DEVICE 00 0000000000 0000000000 All unconfigured devices
Class A DEVICE 00 xxxxxxxxxx xxxxxxxxxx (1...1048576) Third-party devices
Class B1 DEVICE 01 Device number Stationary operator units
(Desigo CC)
0000000000 xxxxxxxxxx
(1...999)
Class B2 DEVICE 01 Device number Mobile operator units / tools
(PXM30/40/50-E)
0000000001 xxxxxxxxxx
(1...999)
Class B3 DEVICE 01 Device number System devices (BACnet
router)
0000000010 xxxxxxxxxx
(1...999)
Class C DEVICE 10 Site number Device number Automation stations (PXC…)
System controllers (PXC…)
xxxxxxxxxx
(1...999)
xxxxxxxxxx
(1...999)
Class D DEVICE 11 xxxxxxxxxx xxxxxxxxxx (1...1048576) Reserved
The device name is the object name of the BACnet device object.
Application Layer
Network Layer
ISO8802-2 Type 1
(IEEE802.2)
Ethernet
ISO8802-3
(IEEE802.3)
ARCNET EIA-485 EIA-232
LonTalk
(EIA 709.1)
PTPMS/TP
BACnet Layers
Application Layer
Network Layer
Data Link Layer
Physical Layer
Supported in Desigo
ISO/OSI Layers
Ethernet
ISO8802-3
(IEEE802.3)
BVLL
UDP/IP
ISO8802-2 Type 1
(IEEE802.2)
TP/FT 10
(EIA-709.1)
VMAC
BVLLv6
UDP/IPv6
Only via PXG3 router
BZLL
ZigBee
IEEE
802.15.4
Application Layer
Network Layer
PTPIPLonTalk MSTP
Device ID
Device name