User Manual

Network architecture
BACnet architecture (MLN & ALN)
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Different rules for object names apply for configuring TD (Technical
Designation), UD (User Designation), or FD (Free Designation):
● The TD is generated from predefined partial names, separated by an
apostrophe ('), that show the technical hierarchy with plant, partial plant,
and component. The TD is supplemented by site name and pin name.
● The names may consist of upper- and lowercase letters and numbers 0 to 9.
The site name is separated by a colon (:) and the pin name by a period (.).
The maximum total length is 30 characters.
● The UD is formed similar to the TD based on partial names. However, users
determine the partial names, structure, and separators. The names consist
of upper- and lowercase letters, numbers 0 to 9, and separators, such as _-
;=’, etc. The maximum total length (including site name and pin name) is 80
characters.
● The FD is a freely assigned name consisting of letters, numbers and a few
special characters, limited within the system only by uniqueness and length.
The maximum total length is 80 characters, ten of which, plus one
separator, are reserved for the site name.
Category Device name Description
Unconfigured ““ Empty string for unconfigured devices
Class A No rules
Class B1 Meaningful text for the user (this text is used as a
reference for the alarm recipient)
Class B2 Model name + device ID Model name + “ “ + 8 character device ID (hexadecimal).
The device name for temporary devices is generated
automatically.
Class B3 Max. 25 characters
Class C Site name + automation station name Site name + “:“ + automation station name
Examples from the topology at the beginning of the chapter:
Category Site number Device
number
Device ID Site name Device name Device name
A – 1 0x02000001 – Third-party 1 Third-party 1
B1 – 1 0x02100001 – Desigo CC 1 Desigo CC 1
B2 – 15 0x02100401 – – PXM20TMP0210040f
C 1 1 0x02200401 Cham PXC #1 Cham:PXC #1
C 1 2 0x02200402 Cham PXC #2 Cham:PXC #2
C 1 3 0x02200403 Cham PXC... #1 Cham:PXC... #1
C 2 1 0x02200801 Zug PXC #1 Zug:PXC #1
C 2 2 0x02200802 Zug PXC... #1 Zug:PXC... #1
C 3 1 0x02200C02 Baar PXC #1 Baar:PXC #1
The BACnet device parameters are written to the devices during
commissioning. These parameters include the following values:
Guidelines
BACnet device
parameters