Application Datatype

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Application Datatypes (or colloquially, Application Tags) have a fixed meaning for each tag number. See the table below.

See Context Tags for the alternative encodings.

Also known as Primitive Datatypes

Note that Proprietary Datatypes can only be constructed using these Application Datatypes


Tag Numbers for Application Datatypes
Tag Number Description
0 Null
1 Boolean
2 Unsigned Integer (1)
3 Signed Integer
4 Real
5 Double
6 Octet String
7 Character String
8 Bit String
9 Enumerated
10 Date
11 Time
12 BACnetObjectIdentifier
13 Reserved
14 Reserved
15 Reserved - Indicates that the following Octect contains an 8-bit Tag Number


Notes: (1) Unsigned integers can be

Unsigned8

Unsigned16

Unsigned32


BACnet Specification, Section 20.2.1.4, page 378


Also: BACnet Specification, page 407


Keyword List
APDU BBMD BVLC BVLL DADR DNET Encoding I-Am LSAP MAC NPCI NPDU NSAP NSDU SA SADR SNET

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