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BACnet

November 26, 2023

BACnet is a communication protocol for building automation and control (BAC) networks that use the ASHRAE, ANSI, and ISO 16484-5 standards[1] protocol.

BACnet was designed to allow communication of building automation and control systems for applications such as heating, ventilating, and air-conditioning control (HVAC), lighting control, access control, and fire detection systems and their associated equipment. The BACnet protocol provides mechanisms for computerized building automation devices to exchange information, regardless of the particular building service they perform.

History edit

The development of the BACnet protocol began in June, 1987, in Nashville, Tennessee, at the inaugural meeting of the ASHRAE BACnet committee, known at that time as SPC 135P, "EMCS Message Protocol".[2] The committee worked at reaching consensus using working groups to divide up the task of creating a standard. The working groups focused on specific areas and provided information and recommendations to the main committee. The first three working groups were the Data Type and Attribute Working Group, Primitive Data Format Working Group, and the Application Services Working Group.

BACnet became ASHRAE/ANSI Standard 135 in 1995, and ISO 16484-5 in 2003. The Method of Test for Conformance to BACnet was published in 2003 as BSR/ASHRAE Standard 135.1. BACnet is under continuous maintenance by the ASHRAE Standing Standard Project Committee 135.

BACnet had an almost immediate impact on the HVAC controls industry. In 1996 Alerton announced a BACnet product line for HVAC controls, from the operator's workstation to small variable air volume (VAV) controllers.[3] Automated Logic Corporation and Delta Controls soon followed suit. On July 12, 2017, BACnet reached a milestone with the issuance of the 1000th Vendor ID. Vendor IDs are assigned by ASHRAE and are distributed internationally. Those vendor identifiers can be viewed at the BACnet website 2009-11-21 at the Wayback Machine.

H. Michael (Mike) Newman, Manager of the Computer Section of the Utilities and Energy Management Department at Cornell University, served as the BACnet committee chairman until June, 2000, when he was succeeded by his vice-chair of 13 years, Steven (Steve) Bushby from NIST.

During Steve Bushby's four-year term as committee chair the BACnet standard was republished twice, in 2001 and 2004, each time with new capabilities added to the standard. The 2001 version featured, among other things, extensions to support fire / life-safety systems.

In June, 2004, 17 years after the first BACnet meeting and back in Nashville, William (Bill) Swan (a.k.a. "BACnet Bill") from Alerton began his four-year stint as committee chair. During his term the number of committee working groups grew to 11, pursuing areas such as support for lighting, access control, energy utility/building integration, and wireless communications.

In January 2006 the BACnet Manufacturers Association and the BACnet Interest Group of North America combined their operation in a new organization called BACnet International 2020-08-17 at the Wayback Machine.

In June 2008, in Salt Lake City, Dave Robin from Automated Logic Corporation took over the reins as the new committee chair after serving 4 years as vice chair. During Dave's term, 22 addenda were published for the 135-2008 standard and republished as 135-2010. Several addenda were published for 135-2010 and the standard was republished as 135-2012.

In June 2012, in San Antonio, Carl Neilson from Delta Controls took over the reins as the new committee chair after serving 4 years as vice chair. During Carl's term, 12 addenda were published for the 135-2012 standard and it was republished as 135-2016. Carl stepped down as chair in June 2015.

In June 2015, Bernhard Isler, from Siemens, became chair after serving 3 years as vice chair and 4 years as secretary. During Bernhard's term, 10 addenda were published for the 135-2016 standard. Once addenda to 135.1-2013 was also published. Bernhard stepped down as chair in June 2018.

In June 2018, Michael Osborne from Reliable Controls, became chair after serving 3 years as secretary and 3 years as vice chair.

Protocol overview edit

The BACnet protocol defines a number of services that are used to communicate between building devices. The protocol services include Who-Is, I-Am, Who-Has, I-Have, which are used for Device and Object discovery. Services such as Read-Property and Write-Property are used for data sharing. As of ANSI/ASHRAE 135-2016, the BACnet protocol defines 60 object types that are acted upon by the services.

The BACnet protocol defines a number of data link and physical layers, including ARCNET, Ethernet, BACnet/IP, BACnet/IPv6, BACnet/MSTP, point-to-point over RS-232, multidrop serial bus with token passing over RS-485, Zigbee, and LonTalk.

BACnet objects edit

ANSI/ASHRAE 135-2016 specifies 60 standard object types:

  • Access Credential
  • Access Door
  • Access Point
  • Access Rights
  • Access User
  • Access Zone
  • Accumulator
  • Alert Enrollment
  • Analog Input
  • Analog Output
  • Analog Value
  • Averaging
  • Binary Input
  • Binary Lighting Output
  • Binary Output
  • Binary Value
  • BitString Value
  • Calendar
  • Channel
  • CharacterString Value
  • Command
  • Credential Data Input
  • Date Pattern Value
  • Date Value
  • DateTime Pattern Value
  • DateTime Value
  • Device
  • Elevator Group
  • Escalator
  • Event Enrollment
  • Event Log
  • File
  • Global Group
  • Group
  • Integer Value
  • Large Analog Value
  • Life Safety Point
  • Life Safety Zone
  • Lift
  • Lighting Output
  • Load Control
  • Loop
  • Multi-state Input
  • Multi-state Output
  • Multi-state Value
  • Network Port
  • Network Security
  • Notification Class
  • Notification Forwarder
  • Octetstring Value
  • Positive Integer Value
  • Program
  • Pulse Converter
  • Schedule
  • Structured View
  • Time Pattern Value
  • Time Value
  • Timer
  • Trend Log
  • Trend Log Multiple

BACnet testing edit

BACnet Testing Laboratories ("BTL") was established by BACnet International to test products to BACnet standards and support compliance testing and interoperability testing activities and consists of BTL Manager and the BTL working group ("BTL-WG"). The general activities of the BTL are:

  • Publishing the BTL Implementation Guidelines document
  • Certifying the products per BACnet testing and BTL guidelines
  • Supporting the activities of the BTL-WG
  • Maintaining the BTL test packages
  • Approving Testing Laboratories for BTL Testing

The BTL also provides testing services through BACnet Laboratories. The BTL Managers and BTL working groups of BACnet International administer the test Laboratories. All BTL-recognized BACnet Test Organizations are ISO 17025 accredited.

In January, 2017, a new BTL certification program was announced. Under this program, the work of the BTL and WSPCert (the European BACnet certification body) is merged. This merger forms a single point of testing for both the BTL Mark and the Certificate of Conformance.

References edit

  1. ^ "Standard 135-2016-- BACnet--A Data Communication Protocol for Building Automation and Control Networks (ANSI Approved)". 2016. {{cite journal}}: Cite journal requires |journal= (help)
  2. ^ SPC 135P (June 26, 1987). (PDF). ASHRAE. Archived from the original (PDF) on 2022-02-05. Retrieved August 7, 2017.{{cite web}}: CS1 maint: numeric names: authors list (link)
  3. ^ Newman, Michael (2013). "2.9.1 ALERTON". BACnet. New York: Momentum Press. ISBN 9781606502907. OCLC 909981984 – via Google Books.

External links edit

  • BACnet website
  • BACnet International 2020-08-17 at the Wayback Machine
  • Open Source BACnet Stack in C

November 26, 2023
bacnet, this, article, multiple, issues, please, help, improve, discuss, these, issues, talk, page, learn, when, remove, these, template, messages, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citatio. This article has multiple issues Please help improve it or discuss these issues on the talk page Learn how and when to remove these template messages This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources BACnet news newspapers books scholar JSTOR March 2018 Learn how and when to remove this template message This article relies excessively on references to primary sources Please improve this article by adding secondary or tertiary sources Find sources BACnet news newspapers books scholar JSTOR July 2012 Learn how and when to remove this template message Learn how and when to remove this template message BACnet is a communication protocol for building automation and control BAC networks that use the ASHRAE ANSI and ISO 16484 5 standards 1 protocol BACnet was designed to allow communication of building automation and control systems for applications such as heating ventilating and air conditioning control HVAC lighting control access control and fire detection systems and their associated equipment The BACnet protocol provides mechanisms for computerized building automation devices to exchange information regardless of the particular building service they perform Contents 1 History 2 Protocol overview 3 BACnet objects 4 BACnet testing 5 References 6 External linksHistory editThe development of the BACnet protocol began in June 1987 in Nashville Tennessee at the inaugural meeting of the ASHRAE BACnet committee known at that time as SPC 135P EMCS Message Protocol 2 The committee worked at reaching consensus using working groups to divide up the task of creating a standard The working groups focused on specific areas and provided information and recommendations to the main committee The first three working groups were the Data Type and Attribute Working Group Primitive Data Format Working Group and the Application Services Working Group BACnet became ASHRAE ANSI Standard 135 in 1995 and ISO 16484 5 in 2003 The Method of Test for Conformance to BACnet was published in 2003 as BSR ASHRAE Standard 135 1 BACnet is under continuous maintenance by the ASHRAE Standing Standard Project Committee 135 BACnet had an almost immediate impact on the HVAC controls industry In 1996 Alerton announced a BACnet product line for HVAC controls from the operator s workstation to small variable air volume VAV controllers 3 Automated Logic Corporation and Delta Controls soon followed suit On July 12 2017 BACnet reached a milestone with the issuance of the 1000th Vendor ID Vendor IDs are assigned by ASHRAE and are distributed internationally Those vendor identifiers can be viewed at the BACnet website Archived 2009 11 21 at the Wayback Machine H Michael Mike Newman Manager of the Computer Section of the Utilities and Energy Management Department at Cornell University served as the BACnet committee chairman until June 2000 when he was succeeded by his vice chair of 13 years Steven Steve Bushby from NIST During Steve Bushby s four year term as committee chair the BACnet standard was republished twice in 2001 and 2004 each time with new capabilities added to the standard The 2001 version featured among other things extensions to support fire life safety systems In June 2004 17 years after the first BACnet meeting and back in Nashville William Bill Swan a k a BACnet Bill from Alerton began his four year stint as committee chair During his term the number of committee working groups grew to 11 pursuing areas such as support for lighting access control energy utility building integration and wireless communications In January 2006 the BACnet Manufacturers Association and the BACnet Interest Group of North America combined their operation in a new organization called BACnet International Archived 2020 08 17 at the Wayback Machine In June 2008 in Salt Lake City Dave Robin from Automated Logic Corporation took over the reins as the new committee chair after serving 4 years as vice chair During Dave s term 22 addenda were published for the 135 2008 standard and republished as 135 2010 Several addenda were published for 135 2010 and the standard was republished as 135 2012 In June 2012 in San Antonio Carl Neilson from Delta Controls took over the reins as the new committee chair after serving 4 years as vice chair During Carl s term 12 addenda were published for the 135 2012 standard and it was republished as 135 2016 Carl stepped down as chair in June 2015 In June 2015 Bernhard Isler from Siemens became chair after serving 3 years as vice chair and 4 years as secretary During Bernhard s term 10 addenda were published for the 135 2016 standard Once addenda to 135 1 2013 was also published Bernhard stepped down as chair in June 2018 In June 2018 Michael Osborne from Reliable Controls became chair after serving 3 years as secretary and 3 years as vice chair Protocol overview editThe BACnet protocol defines a number of services that are used to communicate between building devices The protocol services include Who Is I Am Who Has I Have which are used for Device and Object discovery Services such as Read Property and Write Property are used for data sharing As of ANSI ASHRAE 135 2016 the BACnet protocol defines 60 object types that are acted upon by the services The BACnet protocol defines a number of data link and physical layers including ARCNET Ethernet BACnet IP BACnet IPv6 BACnet MSTP point to point over RS 232 multidrop serial bus with token passing over RS 485 Zigbee and LonTalk BACnet objects editANSI ASHRAE 135 2016 specifies 60 standard object types Access Credential Access Door Access Point Access Rights Access User Access Zone Accumulator Alert Enrollment Analog Input Analog Output Analog Value Averaging Binary Input Binary Lighting Output Binary Output Binary Value BitString Value Calendar Channel CharacterString Value Command Credential Data Input Date Pattern Value Date Value DateTime Pattern Value DateTime Value Device Elevator Group Escalator Event Enrollment Event Log File Global Group Group Integer Value Large Analog Value Life Safety Point Life Safety Zone Lift Lighting Output Load Control Loop Multi state Input Multi state Output Multi state Value Network Port Network Security Notification Class Notification Forwarder Octetstring Value Positive Integer Value Program Pulse Converter Schedule Structured View Time Pattern Value Time Value Timer Trend Log Trend Log MultipleBACnet testing editBACnet Testing Laboratories BTL was established by BACnet International to test products to BACnet standards and support compliance testing and interoperability testing activities and consists of BTL Manager and the BTL working group BTL WG The general activities of the BTL are Publishing the BTL Implementation Guidelines document Certifying the products per BACnet testing and BTL guidelines Supporting the activities of the BTL WG Maintaining the BTL test packages Approving Testing Laboratories for BTL TestingThe BTL also provides testing services through BACnet Laboratories The BTL Managers and BTL working groups of BACnet International administer the test Laboratories All BTL recognized BACnet Test Organizations are ISO 17025 accredited In January 2017 a new BTL certification program was announced Under this program the work of the BTL and WSPCert the European BACnet certification body is merged This merger forms a single point of testing for both the BTL Mark and the Certificate of Conformance References edit Standard 135 2016 BACnet A Data Communication Protocol for Building Automation and Control Networks ANSI Approved 2016 a href Template Cite journal html title Template Cite journal cite journal a Cite journal requires journal help SPC 135P June 26 1987 Minutes of the First SPC 135P Meeting PDF ASHRAE Archived from the original PDF on 2022 02 05 Retrieved August 7 2017 a href Template Cite web html title Template Cite web cite web a CS1 maint numeric names authors list link Newman Michael 2013 2 9 1 ALERTON BACnet New York Momentum Press ISBN 9781606502907 OCLC 909981984 via Google Books External links editBACnet website BACnet International Archived 2020 08 17 at the Wayback Machine Open Source BACnet Stack in C Retrieved from https en wikipedia org w index php title BACnet amp oldid 1170188236, wikipedia, wiki, book, books, library,

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