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BACnet Gateway
6.2 Object and Property of BACnet Protocol
6.2.1 Definition of BACnet Object
BACnet defines a group of objects with property to represent any functions of
building self-control equipment, thus provide a standard method to represent
building self-control equipment. The BACnet gateway defines 9 objects, the
enumeration number, name and application sample of these objects are introduced
as follows.
No.
Object name
0
Analog Input
1
Analog Output
2
Analog Value
3
Binary Input
4
Binary Output
5
Binary Value
13
Multi-state Input
Multi-state
14
Output
Multi-state
19
Value
CharacterString
40
Value
Each object has a set of property,the property value describes the features
and functions of the objects.
6.2.2 Table of BACnet Protocol Point
One BACnet object ID is consist of the following 5 parts:
10 bits
Reserved
Model series:
Including split type unit (1) and UNI SPLIT series (2)...
Equipment type:
Include the gateway itself (0), IDU(1), ODU(2) and others (3)(I0
module). Equipment migration: for IDU object, it means the IDU No.;
Sensor input.
Control output.
The set valve value or other analog control system parameter.
Switch input.
Relay output.
Digital control system parameter.
Indicate a multi-state processing program situation, such as
open/close refrigerator and defrosting cycle etc.
Indicate a multi-state processing program expectation status,
e.g. started cooling time for refrigerator.
Indicate a multi-state processing program parameter, such as
AC fan speed setting and mode setting, etc.
Represent a character parameter, for example, the unlock
password and serial number
BACnet object ID
3 bits
Model series
(assigned to be 0)
(M)
Application sample
32bits
(
)
2 bits
Equipment type
(01,02,03)
migration(N)
(D)
18
9 bits
8 bits
Equipment
Parameter
No.(P)
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