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BACnet®, the ASHRAE Building Automation and Control Networking Protoco

BACnet, the ASHRAE building automation and control networking protocol, has been designed specifically to meet the communication needs of building automation and control systems for applications such as heating, ventilating, and air-conditioning control; fire and other life safety and security systems; energy management; lighting control; physical access control; and elevator monitoring systems.

The BACnet protocol provides mechanisms by which computerized equipment of arbitrary function may exchange information, regardless of the particular building service it performs. As a result, the BACnet protocol may be used by mobile and cloud-hosted devices, head-end computers, general-purpose direct digital controllers, and application-specific or unitary controllers with equal effect.

This protocol provides a comprehensive set of messages for conveying encoded building automation data between devices including, but not limited to

(a) hardware binary input and output values,
(b) hardware analog input and output values,
(c) software data values,
(d) schedule information,
(e) alarm and event information,
(f) trend and event logs,
(g) files,
(h) control logic,
(i) application specific data for a large range of building services, and
(j) network configuration including security.

Standard 135-2016 -- BACnet®--A Data Communication Protocol for Building Automation and Control Networks

135-2016.jpgThe purpose of Standard 135 is to define data communication services and protocols for computer equipment used for monitoring and control of HVAC&R and other building systems and to define an abstract, object-oriented representation of information communicated between such equipment.

$90 (ASHRAE Member $76)


Method of Test: Standard 135.1-2013 -- Method of Test for Conformance to BACnet

Momentum Press -- BACnet: The Global Standard for Building Automation and Control Networks

BACnet Momentum.jpg
This new book by H. Michael Newman, original chairman of the BACnet committee, explains how the BACnet protocol manages all basic building functions in a seamless, integrated way.

The book explains how BACnet works with all major control systems--including those of Honeywell, Siemens and Johnson Controls--to manage everything from heating to ventilation to lighting to fire control and alarm systems. Contractors, architects, building systems engineers and facilities managers must all be cognizant of BACnet and its applications. Learn more

Bacnet® Today and the Smart Grid - 2013

BACnet Today.jpgpdf_icon.png  BACnet® Explained, Part One
By H. Michael Newman

BACnet® Explained, Part Two
By Grant Wichenko, P.Eng.

 Microgrids for Energy Reliability
By Dave Robinson

  Securing a Control Systems Network
By Carl Neilson

  Smart Grid and Building Operators
By Phil Davis

  Communicating Submeter Data Via BACnet
By David Bovankovich

What's Next for BACnet® and the Smart Grid - 2012

Journal BACnet cover.jpgpdf_icon.png OpenADR Advances 
David G. Holmberg
, Girish Ghatikar, Edward L. Koch, Jim Boch. P. B16. Nov.

pdf_icon.png Electric Utilities and The HVAC Industry 
Mike Oldak
. P. B10. Nov.

pdf_icon.png BACnet for a City 
Steven T. Tom
. P. B4. Nov.

pdf_icon.png Demand Response and Light Control 
Scott Ziegenfus
. P. B20. Nov. 

BACnet® Today & the Smart Grid - 2011

BACnet Today Cover.jpgpdf_icon.png  Information Model Standard for Integrating Facilities With Smart Grid 
Steven T. Bushby
 P. B18. Nov.

pdf_icon.png  Demand Response and Standards: New Role for Buildings in the Smart Grid 
David Holmberg
 P. B23. Nov.

pdf_icon.png  BACnet Alarming Revised 
Bernhard Isler
 P. B12. Nov.

pdf_icon.png Getting Smart on the Electrical Grid 
Ed Koch
, Roy Kolasa  P. B29. Nov.

pdf_icon.png BACnet: Operator Workstations 
Steven T. Tom
. P. B6. Nov.

ASHRAE Members enjoy free access to current and archived editions of ASHRAE Journal, including content that appears in BACnet® Today. Simply login to the Members Only section to search, browse, and view articles from 1997-present.


Other Resources

ASHRAE Learning Institute Short Course: Introduction to BACnet®