EN ISO 16484-5:2010

SLOVENSKI STANDARD
01-maj-2011
Avtomatizacija stavb in sistemi za regulacijo - 5. del: Protokol izmenjave podatkov
(ISO 16484-5:2010)
Building automation and control systems - Part 5: Data communication protocol (ISO
16484-5:2010)
Systeme der Gebäudeautomation - Teil 5: Datenkommunikationsprotokoll (ISO 16484-
5:2010)
Systèmes d'automatisation et de gestion technique du bâtiment - Partie 5: protocole de
communication de données (ISO 16484-5:2010)
Ta slovenski standard je istoveten z: EN ISO 16484-5:2010
ICS:
35.240.99 8SRUDEQLãNHUHãLWYH,7QD IT applications in other fields
GUXJLKSRGURþMLK
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 16484-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2010
ICS 35.240.99; 91.040.01 Supersedes EN ISO 16484-5:2008
English Version
Building automation and control systems - Part 5: Data
communication protocol (ISO 16484-5:2010)
Systèmes d'automatisation et de gestion technique du Systeme der Gebäudeautomation - Teil 5:
bâtiment - Partie 5: protocole de communication de Datenkommunikationsprotokoll (ISO 16484-5:2010)
données (ISO 16484-5:2010)
This European Standard was approved by CEN on 6 December 2010.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16484-5:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 16484-5:2010) has been prepared by Technical Committee ISO/TC 205 “Building
environment design” in collaboration with Technical Committee CEN/TC 247 “Building Automation, Controls
and Building Management” the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2011, and conflicting national standards shall be withdrawn at
the latest by June 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 16484-5:2008.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 16484-5:2010 has been approved by CEN as a EN ISO 16484-5:2010 without any
modification.
INTERNATIONAL ISO
STANDARD 16484-5
Third edition
2010-12-01
Building automation and control
systems —
Part 5:
Data communication protocol
Systèmes d'automatisation et de gestion technique du bâtiment —
Partie 5: Protocole de communication de données

Reference number
ISO 16484-5:2010(E)
©
ISO 2010
ISO 16484-5:2010(E)
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ii © ISO 2010 – All rights reserved

ISO 16484-5:2010(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16484-5 was prepared by the American Society of Heating, Refrigerating and Air-Conditioning Engineers
(ASHRAE) (as ANSI/ASHRAE 135-2008) and was adopted without modifications by Technical Committee
ISO/TC 205, Building environment design.
This third edition cancels and replaces the second edition (ISO 16484-5:2007), which has been technically
revised, as detailed in the enclosed ANSI/ASHRAE publication, pages 682 to 687. It also incorporates the
Amendment ISO 16484-5:2007/Amd1:2009.
ISO 16484 consists of the following parts, under the general title Building automation and control systems:
⎯ Part 1: Project specification and implementation
⎯ Part 2: Hardware
⎯ Part 3: Functions
⎯ Part 5: Data communication protocol
⎯ Part 6: Data communication conformance testing
Applications and project implementation are to form the subjects of future Parts 4 and 7.

INTERNATIONAL STANDARD ISO 16484-5:2010(E)

Building automation and control systems —
Part 5:
Data communication protocol
1 Scope
This part of ISO 16484 defines data communication services and protocols for computer equipment used for
monitoring and control of heating, ventilation, air-conditioning and refrigeration (HVAC&R) and other building
systems. It defines, in addition, an abstract, object-oriented representation of information communicated
between such equipment, thereby facilitating the application and use of digital control technology in buildings.
The scope and field of application are furthermore detailed in Clause 2 of the enclosed ANSI/ASHRAE
publication.
2 Requirements
Requirements are the technical recommendations made in the following publication (reproduced on the
following pages), which is adopted as an International Standard:
ANSI/ASHRAE 135-2008, A Data Communication Protocol for Building Automation and Control
Networks
The text on the back of the title page of the ANSI/ASHRAE standard and the policy statement on the last page
are not relevant for the purposes of international standardization.
The following International Standards are cited in the text:
ISO/IEC 7498 (all parts), Information technology — Open Systems Interconnection — Basic Reference Model
ISO/TR 8509, Information processing systems — Open Systems Interconnection — Service conventions
ISO/IEC 8649, Information technology — Open Systems Interconnection — Service definition for the
Association Control Service Element
ISO/IEC 8802-2, Information technology — Telecommunications and information exchange between
systems — Local and metropolitan area networks — Specific requirements — Part 2: Logical link control
ISO/IEC 8802-3, Information technology — Telecommunications and information exchange between
systems — Local and metropolitan area networks — Specific requirements — Part 3: Carrier sense multiple
access with collision detection (CSMA/CD) access method and physical layer specifications
ISO/IEC 8824 (all parts), Information technology — Abstract Syntax Notation One (ASN.1)
ISO/IEC 8825 (all parts), Information technology — ASN.1 encoding rules
ISO/IEC 8859-1, Information technology — 8-bit single-byte coded graphic character sets — Part 1: Latin
alphabet No. 1
ISO 16484-5:2010(E)
ISO/IEC 9545, Information technology — Open Systems Interconnection — Application Layer structure
ISO/IEC 10646, Information technology — Universal Multiple-Octet Coded Character Set (UCS)
3 Revision of ANSI/ASHRAE 135
It has been agreed with the American Society of Heating, Refrigerating and Air-Conditioning Engineers
(ASHRAE) that Technical Committee ISO/TC 205 will be consulted in the event of any revision or amendment
of ANSI/ASHRAE 135. To this end, ANSI will act as a liaison body between ASHRAE and ISO.
2 © ISO 2010 – All rights reserved

ISO 16484-5:2010(E)
ANSI/ASHRAE Standard 135-2008
(Including ANSI/ASHRAE addenda listed in the History of Revisions)
ASHRAE STANDARD
ASHRAE STANDARD
A Data Communication
Protocol for Building
Automation and
Control Networks
See the History of Revisions at the end of this standard for approval dates by the ASHRAE Standards
Committee, the ASHRAE Board of Directors, and the American National Standards Institute.
This standard is under continuous maintenance by a Standing Standard Project Committee (SSPC) for which
the Standards Committee has established a documented program for regular publication of addenda or revi-
sions, including procedures for timely, documented, consensus action on requests for change to any part of
the standard. The change submittal form, instructions, and deadlines may be obtained in electronic form from
the ASHRAE Web site, http://www.ashrae.org, or in paper form from the Manager of Standards. The latest edi-
tion of an ASHRAE Standard may be purchased from ASHRAE Customer Service, 1791 Tullie Circle, NE,
Atlanta, GA 30329-2305. E-mail: orders@ashrae.org. Fax: 404-321-5478. Telephone: 404-636-8400 (world-
wide), or toll free 1-800-527-4723 (for orders in US and Canada).
© Copyright 2008 ASHRAE
ISSN 1041-2336
American Society of Heating, Refrigerating
and Air-Conditioning Engineers, Inc.
1791 Tullie Circle NE, Atlanta, GA 30329
www.ashrae.org
ISO 16484-5:2010(E)
(Blank page)
4 © ISO 2010 – All rights reserved

ISO 16484-5:2010(E)
ASHRAE STANDING STANDARD PROJECT COMMITTEE 135
Cognizant TC: TC 1.4, Control Theory and Applications
SPLS Liaison: Frank E. Jakob
William O. Swan III, Chair Harsha M. Dabholkar Jerald P. Martocci
David W. Robin, Vice-Chair Sharon E. Dinges H. Michael Newman
Carl Neilson, Secretary Dana R. Epperson Cherisse M. Nicastro
Donald. P. Alexander Thomas Ertsgaard Robert L. Old
Ron E. Anderson Craig P. Gemmill Mark A. Railsback
Beauford W. Atwater Daniel P. Giorgis Carl J. Ruther
David J. Branson Ira G. Goldschmidt Ernest Senior
Barry B. Bridges Winston I. Hetherington Patrick Sheridan
Coleman L. Brumley, Jr. David G. Holmberg David G. Shike
Ernest C. Bryant Anthony J. Icenhour Kevin Sweeney
Steven T. Bushby Robert L. Johnson David B. Thompson
James F. Butler Stephen Karg Daniel A. Traill
A. J. Capowski J. Damian Ljungquist J. Michael Whitcomb
Keith A. Corbett James G. Luth David F. White
Jeffrey Cosiol John J. Lynch Grant N. Wichenki
Troy Cowan Robert J. Zamojcin

The following persons served as consultants to the project committee:

Alexander Andreyev Koichi Ikeda Dave Richards
Martin Burns Bernhard Isler David H. Ritter
Christopher Chapman Hiroshi Ito Frank Schubert
Howard Coleman René Kälin Randy Shaull
Clifford H. Copass Michael Kinter-Myers Takeji Toyoda
Stuart Donaldson Roland Laird Stephen Treado
Peter Fischer Simon Lemaire Ketki Vahalia
David Fisher Joseph S. Majewski Alan Vinh
Wilson Fowlie Jerald Martocci Bruce Westphal
Rokuro Fujii Les Mather David White
Andrey Golovin Kornelia Mergner Graham Whiting
Don Gottschalk Hans-Joachim Mundt Todd Wiese
John L. Hartman Masahara Nakamura Cameron Williams
Daniel Heine Jack Neyer Ove Wiuff
Yoshiyuki Honda Duffy O'Craven Christoph Zeller
Ted Humpal Masahiro Ogawa Chad Ziehm
Cuong Huynh Michael Olson Rob Zivney
René Quirighetti
ASHRAE 135-2008 i
ISO 16484-5:2010(E)
(Blank page)
ISO 16484-5:2010(E)
CONTENTS
FOREWORD ………………………………………………………………………………………………………………….vii
1 PURPOSE.1
2 SCOPE.1
3 DEFINITIONS .1
3.1 Terms Adopted from International Standards.1
3.2 Terms Defined for this Standard.2
3.3 Abbreviations and Acronyms Used in this Standard .5
4 BACnet PROTOCOL ARCHITECTURE.8
4.1 The BACnet Collapsed Architecture .9
4.2 BACnet Network Topology.11
4.3 Security.13
5 THE APPLICATION LAYER .14
5.1 The Application Layer Model.14
5.2 Segmentation of BACnet Messages .18
5.3 Transmission of BACnet APDUs.19
5.4 Application Protocol State Machines.23
5.5 Application Protocol Time Sequence Diagrams.37
5.6 Application Layer Service Conventions .45
6 THE NETWORK LAYER .47
6.1 Network Layer Service Specification .47
6.2 Network Layer PDU Structure .48
6.3 Messages for Multiple Recipients.53
6.4 Network Layer Protocol Messages .54
6.5 Network Layer Procedures .56
6.6 BACnet Routers.58
6.7 Point-To-Point Half-Routers.63
7 DATA LINK/PHYSICAL LAYERS: ISO 8802-3 ("Ethernet") LAN.68
7.1 The Use of ISO 8802-2 Logical Link Control (LLC).68
7.2 Parameters Required by the LLC Primitives .68
7.3 Parameters Required by the MAC Primitives.68
7.4 Physical Media .68
8 DATA LINK/PHYSICAL LAYERS: ARCNET LAN.70
8.1 The Use of ISO 8802-2 Logical Link Control (LLC).70
8.2 Parameters Required by the LLC Primitives .70
8.3 Mapping the LLC Services to the ARCNET MAC Layer.70
8.4 Parameters Required by the MAC Primitives.70
8.5 Physical Media .70
9 DATA LINK/PHYSICAL LAYERS: MASTER-SLAVE/TOKEN PASSING (MS/TP) LAN .72
9.1 Service Specification .72
9.2 Physical Layer .74
9.3 MS/TP Frame Format.76
9.4 Overview of the MS/TP Network.77
9.5 MS/TP Medium Access Control.78
9.6 Cyclic Redundancy Check (CRC) .94
9.7 Interfacing MS/TP LANs with Other BACnet LANs.95
9.8 Responding BACnet User Processing of Messages from MS/TP.95
9.9 Repeaters .96
10 DATA LINK/PHYSICAL LAYERS: POINT-TO-POINT (PTP).98
10.1 Overview .98
10.2 Service Specification .98
10.3 Point-to-Point Frame Format.103
10.4 PTP Medium Access Control Protocol.105
11 DATA LINK/PHYSICAL LAYERS: EIA/CEA-709.1 ("LonTalk") LAN .126
11.1 The Use of ISO 8802-2 Logical Link Control (LLC).126
11.2 Parameters Required by the LLC Primitives .126
11.3 Mapping the LLC Services to the LonTalk Application Layer .126
ASHRAE 135-2008 i
ISO 16484-5:2010(E)
11.4 Parameters Required by the Application Layer Primitives.126
11.5 Physical Media .127
12 MODELING CONTROL DEVICES AS A COLLECTION OF OBJECTS.128
12.1 Accumulator Object Type.132
12.2 Analog Input Object Type .140
12.3 Analog Output Object Type.145
12.4 Analog Value Object Type .150
12.5 Averaging Object Type.155
12.6 Binary Input Object Type .158
12.7 Binary Output Object Type.163
12.8 Binary Value Object Type .169
12.9 Calendar Object Type.174
12.10 Command Object Type.176
12.11 Device Object Type .180
12.12 Event Enrollment Object Type .188
12.13 File Object Type .193
12.14 Group Object Type .195
12.15 Life Safety Point Object Type .197
12.16 Life Safety Zone Object Type .203
12.17 Loop Object Type.209
12.18 Multi-state Input Object Type.216
12.19 Multi-state Output Object Type.220
12.20 Multi-state Value Object Type .224
12.21 Notification Class Object Type.229
12.22 Program Object Type.232
12.23 Pulse Converter Object Type.237
12.24 Schedule Object Type.244
12.25 Trend Log Object Type .249
12.26 Access Door Object Type.257
12.27 Event Log Object Type.264
12.28 Load Control Object Type .270
12.29 Structured View Object Type .279
12.30 Trend Log Multiple Object Type.281
13 ALARM AND EVENT SERVICES.289
13.1 Change of Value Reporting .290
13.2 Intrinsic Reporting.292
13.3 Algorithmic Change Reporting.296
13.4 Alarm and Event Occurrence and Notification.304
13.5 AcknowledgeAlarm Service.306
13.6 ConfirmedCOVNotification Service .308
13.7 UnconfirmedCOVNotification Service .310
13.8 ConfirmedEventNotification Service.311
13.9 UnconfirmedEventNotification Service.314
13.10 GetAlarmSummary Service.316
13.11 GetEnrollmentSummary Service .318
13.12 GetEventInformation Service .321
13.13 LifeSafetyOperation Service.323
13.14 SubscribeCOV Service .325
13.15 SubscribeCOVProperty Service .327
14 FILE ACCESS SERVICES .330
14.1 AtomicReadFile Service.331
14.2 AtomicWriteFile Service .334
15 OBJECT ACCESS SERVICES.336
15.1 AddListElement Service.336
15.2 RemoveListElement Service.338
15.3 CreateObject Service .340
15.4 DeleteObject Service .342
ISO 16484-5:2010(E)
15.5 ReadProperty Service .343
15.6 ReadPropertyConditional Service.345
15.7 ReadPropertyMultiple Service.350
15.8 ReadRange Service.353
15.9 WriteProperty Service .357
15.10 WritePropertyMultiple Service.359
16 REMOTE DEVICE MANAGEMENT SERVICES.362
16.1 DeviceCommunicationControl Service .362
16.2 ConfirmedPrivateTransfer Service .364
16.3 UnconfirmedPrivateTransfer Service .366
16.4 ReinitializeDevice Service.367
16.5 ConfirmedTextMessage Service.369
16.6 UnconfirmedTextMessage Service.371
16.7 TimeSynchronization Service.372
16.8 UTCTimeSynchronization Service.373
16.9 Who-Has and I-Have Services.374
16.10 Who-Is and I-Am Services .376
17 VIRTUAL TERMINAL SERVICES.378
17.1 Virtual Terminal Model.378
17.2 VT-Open Service.382
17.3 VT-Close Service.384
17.4 VT-Data Service .385
17.5 Default-terminal Characteristics .387
18 ERROR, REJECT, and ABORT CODES.391
18.1 Error Class - DEVICE .391
18.2 Error Class - OBJECT .391
18.3 Error Class - PROPERTY .391
18.4 Error Class - RESOURCES.392
18.5 Error Class - SECURITY .393
18.6 Error Class - SERVICES .393
18.7 Error Class – COMMUNICATION.394
18.8 Error Class - VT .395
18.9 Reject Reason .396
18.10 Abort Reason .396
19 BACnet PROCEDURES .398
19.1 Backup and Restore .398
19.2 Command Prioritization.401
19.3 Device Restart Procedure .404
20 ENCODING BACnet PROTOCOL DATA UNITS.405
20.1 Encoding the Fixed Part of BACnet APDUs.405
20.2 Encoding the Variable Part of BACnet APDUs .415
21 FORMAL DESCRIPTION OF APPLICATION PROTOCOL DATA UNITS .429
22 CONFORMANCE AND INTEROPERABILITY .477
22.1 Conformance to BACnet .477
22.2 BACnet Interoperability .478
23 EXTENDING BACnet TO ACCOMMODATE VENDOR PROPRIETARY INFORMATION .480
23.1 Extending Enumeration Values .480
23.2 Using the PrivateTransfer Services to Invoke Non-Standardized Services .481
23.3 Adding Proprietary Properties to a Standardized Object .481
23.4 Adding Proprietary Object Types to BACnet.481
23.5 Restrictions on Extending BACnet.482
24 NETWORK SECURITY.483
24.1 Security Architecture.483
24.2 Authentication Mechanisms .484
24.3 Data Confidentiality Mechanism .486
24.4 RequestKey Service.487
24.5 Authenticate Service.488
ASHRAE 135-2008 iii
ISO 16484-5:2010(E)
25 REFERENCES .491
ANNEX A - PROTOCOL IMPLEMENTATION CONFORMANCE STATEMENT (NORMATIVE) .494
ANNEX B - GUIDE TO SPECIFYING BACnet DEVICES (INFORMATIVE).496
ANNEX C - FORMAL DESCRIPTION OF OBJECT TYPE STRUCTURES (INFORMATIVE) .497
ANNEX D - EXAMPLES OF STANDARD OBJECT TYPES (INFORMATIVE).512
D.1 Example of an Accumulator Object.512
D.2 Example of an Analog Input Object .
...