Introduction; Purpose; Bacnet; Definitions, Abbreviations And Acronyms - Carrier 30XW User Manual

1 INTRODUCTION

1.1 Purpose

This guide describes the BACnet option for 30XA/XW chillers. It is intended for Building
Management System (BMS) engineers inside or outside the Carrier Corporation.
IMPORTANT
Some parameters can be configured only by Carrier service.

1.2 BACnet

BACnet is a data communication protocol for building automation and control networks.
It is an ISO global standard recognised in more than 30 countries across the world.
BACnet makes it possible to expand and upgrade controls using technology from different
vendors.
BACnet is based on a client-server model and BACnet messages are referred to as
"service requests". The client machine ("user interface") sends the request to the server
machine ("field device") that reports the result. For example, when the "ReadProperty"
service request is sent, the server machine locates the requested property of the
requested object and sends its reading back to the client.

1.3 Definitions, Abbreviations and Acronyms

Acronym/
Definition
Abbreviation
Building Management System
It is a computer-based control system installed in buildings. BMS
BMS controls
equipment such as ventilation, lighting, power systems, fire systems
and security systems. BMS consists of software and hardware.
Building Automation and Controls Network
BACnet/IP Open Protocol for the controlled exchange of data between two or
more intelligent control devices or BMS. BACnet is used over IP.
BACnet Broadcast Management Device
BBMD Broadcast management is accomplished by defining the capabilities of
the new device.
BACnet Interoperability Building Blocks
BIBBS BIBBS are combined to build the BACnet functional requirements for a
specific device.
Change Of Value
A COV notification is sent any time the object's value changes by an
amount specified as a default parameter, or in the subscription
COV
request. Devices wishing to receive the notice of change need to
"subscribe" to the COV by sending a subscription request to the device
from which a COV notification is desired.
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ECG–UG–14-002
30XAXW
BACnet Option
and monitors
REVISION
Rev G March 2017
the building's mechanical
DATE PAGE
6 OF 56
and electrical