Bacnet Networking; What Is Bacnet - ABB CBXi Series User Manual

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BACnet Networking

WHAT IS BACNET?

BACnet is "a data communication protocol for building automation and control networks." This means it
is a set of rules for exchanging BMS information between systems from different manufacturers.
The rules take the form of a written specification that spells out what is required to conform to the
protocol
The key feature of
control equipment - for example, how to ask for the value of a temperature, define a fan operating
schedule, or send a pump status alarm.
BACnet provides a standard way of representing the functions of any device - for example analog or
binary inputs or outputs, schedules, control loops and alarms.
The standardized model of a device represents these common functions as collections of related
information called objects
Each object has a set of properties that further describe it. Each analog input, for instance, is
represented by a
Value', 'Sensor Type', 'Location',
optional.
The only required object in each BACnet controller is the
properties that define the controller's behavior on the network. Each controller's
associated number called the
devices to unambiguously access the controller.
Here is an illustration of
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BACnet is that the rules relate specifically to the needs of building automation and
BACnet "Analog Input object", which has a set of standard properties such as
'Alarm Limits' etc. Some of these properties are required, while others are
Device Instance. It is this unique number that allows all other BACnet
BACnet objects:
CBXi IP Controller |
Device object. This object contains the
BACnet Networking
'Present
Device object has an
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