EN ISO 16484-5:2008

SLOVENSKI STANDARD
01-junij-2008
1DGRPHãþD
SIST EN ISO 16484-5:2004
Avtomatizacija stavb in sistemi za regulacijo - 5. del: Protokol izmenjave podatkov
(ISO 16484-5:2007)
Building automation and control systems - Part 5: Data communication protocol (ISO
16484-5:2007)
Systeme der Gebäudeautomation - Teil 5: Datenkommunikationsprotokoll (ISO 16484-
5:2007)
Systemes d'automatisation et de gestion technique du bâtiment - Partie 5: Protocole de
communication de données (ISO 16484-5:2007)
Ta slovenski standard je istoveten z: EN ISO 16484-5:2008
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
February 2008
ICS 91.040.01; 35.240.99 Supersedes EN ISO 16484-5:2003
English Version
Building automation and control systems - Part 5: Data
communication protocol (ISO 16484-5:2007)
Systèmes d'automatisation et de gestion technique du Systeme der Gebäudeautomation - Teil 5:
bâtiment - Partie 5: Protocole de communication de Datenkommunikationsprotokoll (ISO 16484-5:2007)
données (ISO 16484-5:2007)
This European Standard was approved by CEN on 14 January 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16484-5:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3

Foreword
The text of ISO 16484-5:2007 has been prepared by Technical Committee ISO/TC 205 “Building environment
design” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
16484-5:2008 by 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 August 2008, and conflicting national standards shall be withdrawn at
the latest by August 2008.
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 16484-5:2003.
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, 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 16484-5:2007 has been approved by CEN as a EN ISO 16484-5:2008 without any
modification.
INTERNATIONAL ISO
STANDARD 16484-5
Second edition
2007-03-15
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 16484-5:2007(E)
©
ISO 2007
ISO 16484-5:2007(E)
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ii © ISO 2007 – All rights reserved

ISO 16484-5:2007(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 135-2004) and was adopted without modifications by Technical Committee
ISO/TC 205, Building environment design.
This second edition cancels and replaces the first edition (ISO 16484-5:2003), which has been technically
revised, as detailed in the enclosed ANSI/ASHRAE publication, pages 598 to 601.
ISO 16484 consists of the following parts, under the general title Building automation and control systems:
⎯ Part 1: Overview and definitions
⎯ 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 16484-5:2007(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 135-2004, 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 16484-5:2007(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 2007 – All rights reserved

ISO 16484-5:2007(E)
ANSI/ASHRAE Standard 135-2004
(Including ANSI/ASHRAE addenda listed in the History of Revisions) ®
ASHRAE
STANDARD
BACnet® —
A Data Communication
Protocol for Building
Automation and
Control Networks
Approved by the ASHRAE Standards Committee October 5,
2003; by the ASHRAE Board of Directors Jaunaru 29, 2004; and
by the American National Standards Institute February 25,
2004. See "History of Revisions" section for approval dates of
addenda.
This standard is under continuous maintenance by a Standing
Standard Project Committee (SSPC) for which the Standards
Committee has established a documented program for reqular
publication of addenda or revisions, including procdedures for
timely, documented, consensus action on requests for change
to any part of the standard. The change submittal form,
instructions and deadlines are given at the back of this
document and may be obtained in electronic form from
ASHRAE's Internet Home Page, http://www.ashrae.org, or in
paper form from the Manager of Standards. The latest edition
of an ASHRAE Standard and printed copies of a public review
draft 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 (worldwide), or toll free 1-800-527-4723 (for orders in U.S.
and Canada).
© 2004 American Society of Heating, Refrigerating and Air-
Conditioning Engineers, Inc.
ISSN 1041-2336
AMERICAN SOCIETY OF HEATING,
REFRIGERATING AND
AIR-CONDITIONING ENGINEERS, INC.
1791 Tullie Circle, NE · Atlanta GA 30329-2305
ISO 16484-5:2007(E)
(Blank page)
4 © ISO 2007 – All rights reserved

ISO 16484-5:2007(E)
ASHRAE STANDING STANDARD PROJECT COMMITTEE 135
Cognizant TC: TC 1.4, Control Theory and Applications
SPLS Liaison: Frank E. Jakob
Steven T. Bushby, Chair* Troy D. Cowan* Mark A. Railsback
William O. Swan III, Vice-Chair Daniel P. Giorgis David W. Robin
Carl Neilson, Secretary* Thomas S. Ertsgaard* Ernest L. Senior
Barry B. Bridges* Craig P. Gemmill* Daniel A. Traill*
James F. Butler* Robert L. Johnson J. Michael Whitcomb*
A. J. Capowski* Stephen T. Karg* David F. White
Keith A. Corbett J. Damian Ljungquist* Grant N. Wichenko
Jeffery Cosiol Jerald P. Martocci
*Denotes members of voting status when this standard was approved for publication.

The following persons served as consultants to the project committee:

Andrey Golovin H. Michael Newman David H. Ritter
David G. Holmberg René Quirighetti Takeji Toyoda
__________________________________________________________________________________________________________________

ASHRAE STANDARDS COMMITTEE 2003-2004
Van D. Baxter, Chair Matt R. Hargan Cyrus H. Nasseri
Davor Novosel, Vice-Chair Richard D. Hermans Gideon Shavit
Donald B. Bivens John F. Hogan David R. Tree
Dean S. Borges Frank E. Jakob Thomas H. Williams
Paul W. Cabot Stephen D. Kennedy James E. Woods
Charles W. Coward, Jr. David E. Knebel Kent W. Peterson, CO
Hugh F. Crowther Frederick H. Kohloss Ross D. Montgomery, BOD ExO
Brian P. Dougherty Merle F. McBride
Hakim Elmahdy Mark P. Modera
Claire B. Ramspeck, Manager of Standards
__________________________________________________________________________________________________________________
SPECIAL NOTE
This American National Standard (ANS) is a national voluntary consensus standard developed under the auspices of the American Society of Heating,
Refrigerating and Air-Conditioning Engineers (ASHRAE). Consensus is defined by the American National Standards Institute (ANSI), of which ASHRAE is a
member and which has approved this standard as an ANS, as "substantial agreement reached by directly and materially affected interest categories. This signifies
the concurrence of more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that an effort
be made toward their resolution." Compliance with this standard is voluntary until and unless a legal jurisdiction makes compliance mandatory through
legislation.
ASHRAE obtains consensus through participation of its national and international members, associated societies, and public review.

ASHRAE Standards are prepared by a Project Committee appointed specifically for the purpose of writing the Standard. The Project Committee Chair and Vice-
Chair must be members of ASHRAE; while other members may or may not be members of ASHRAE, all must be technically qualified in the subject area of the
standard. Every effort is made to balance the concerned interests on all Project Committees.

The Manager of Standards of ASHRAE should be contacted for:
a. interpretation of the contents of this Standard,
b. participation in the next review of the Standard,
c. offering constructive criticism for improving the Standard,
d. permission to reprint portions of the Standard.
DISCLAIMER
ASHRAE uses its best efforts to promulgate standards for the benefit of the public in light of available information and accepted industry practices. However,
ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components, or systems tested, designed, installed, or operated in
accordance with ASHRAE's Standards or Guidelines or that any tests conducted under its standards will be nonhazardous or free from risk.

ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDS

ASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for rating purposes, by
suggesting safe practices in designing and installing equipment, by providing proper definitions of this equipment, and by providing other information that
may serve to guide the industry. The creation of ASHRAE Standards and Guidelines is determined by the need for them, and conformance to them is
completely voluntary.
In referring to this standard and marking of equipment and in advertising, no claim shall be made, either stated or implied, that the product has been approved
by ASHRAE.
ISO 16484-5:2007(E)
(Blank page)
6 © ISO 2007 – All rights reserved

ISO 16484-5:2007(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. 95
10 DATA LINK/PHYSICAL LAYERS: POINT-TO-POINT (PTP). 97
10.1 Overview. 97
10.2 Service Specification . 97
10.3 Point-to-Point Frame Format. 102
10.4 PTP Medium Access Control Protocol . 104
11 DATA LINK/PHYSICAL LAYERS: EIA/CEA-709.1 ("LonTalk") LAN. 125
11.1 The Use of ISO 8802-2 Logical Link Control (LLC) . 125
11.2 Parameters Required by the LLC Primitives . 125
ASHRAE 135-2004 i
ISO 16484-5:2007(E)
11.3 Mapping the LLC Services to the LonTalk Application Layer. 125
11.4 Parameters Required by the Application Layer Primitives. 125
11.5 Physical Media . 126
12 MODELING CONTROL DEVICES AS A COLLECTION OF OBJECTS. 127
12.1 Accumulator Object Type . 130
12.2 Analog Input Object Type. 138
12.3 Analog Output Object Type . 143
12.4 Analog Value Object Type. 148
12.5 Averaging Object Type. 153
12.6 Binary Input Object Type. 156
12.7 Binary Output Object Type . 161
12.8 Binary Value Object Type. 167
12.9 Calendar Object Type . 172
12.10 Command Object Type . 174
12.11 Device Object Type . 178
12.12 Event Enrollment Object Type . 185
12.13 File Object Type . 190
12.14 Group Object Type . 192
12.15 Life Safety Point Object Type . 194
12.16 Life Safety Zone Object Type . 200
12.17 Loop Object Type. 206
12.18 Multi-state Input Object Type . 213
12.19 Multi-state Output Object Type. 217
12.20 Multi-state Value Object Type . 221
12.21 Notification Class Object Type. 226
12.22 Program Object Type. 229
12.23 Pulse Converter Object Type. 234
12.24 Schedule Object Type . 241
12.25 Trend Log Object Type. 246
13 ALARM AND EVENT SERVICES. 252
13.1 Change of Value Reporting. 253
13.2 Intrinsic Reporting. 255
13.3 Algorithmic Change Reporting. 258
13.4 Alarm and Event Occurrence and Notification. 266
13.5 AcknowledgeAlarm Service. 269
13.6 ConfirmedCOVNotification Service. 271
13.7 UnconfirmedCOVNotification Service. 273
13.8 ConfirmedEventNotification Service. 274
13.9 UnconfirmedEventNotification Service . 277
13.10 GetAlarmSummary Service. 279
13.11 GetEnrollmentSummary Service . 281
13.12 GetEventInformation Service . 284
13.13 LifeSafetyOperation Service . 286
13.14 SubscribeCOV Service . 288
13.15 SubscribeCOVProperty Service . 290
14 FILE ACCESS SERVICES . 293
14.1 AtomicReadFile Service . 294
14.2 AtomicWriteFile Service. 297
15 OBJECT ACCESS SERVICES. 299
15.1 AddListElement Service . 299
15.2 RemoveListElement Service . 301
15.3 CreateObject Service . 303
15.4 DeleteObject Service . 305
15.5 ReadProperty Service. 306
15.6 ReadPropertyConditional Service. 308
15.7 ReadPropertyMultiple Service. 313
15.8 ReadRange Service. 316
ii ASHRAE 135-2004
8 © ISO 2007 – All rights reserved

ISO 16484-5:2007(E)
15.9 WriteProperty Service. 320
15.10 WritePropertyMultiple Service. 322
16 REMOTE DEVICE MANAGEMENT SERVICES. 325
16.1 DeviceCommunicationControl Service. 325
16.2 ConfirmedPrivateTransfer Service . 327
16.3 UnconfirmedPrivateTransfer Service. 329
16.4 ReinitializeDevice Service . 330
16.5 ConfirmedTextMessage Service. 332
16.6 UnconfirmedTextMessage Service . 334
16.7 TimeSynchronization Service. 335
16.8 UTCTimeSynchronization Service . 336
16.9 Who-Has and I-Have Services. 337
16.10 Who-Is and I-Am Services . 339
17 VIRTUAL TERMINAL SERVICES. 341
17.1 Virtual Terminal Model . 341
17.2 VT-Open Service. 345
17.3 VT-Close Service . 347
17.4 VT-Data Service. 348
17.5 Default-terminal Characteristics. 350
18 ERROR, REJECT, and ABORT CODES. 354
18.1 Error Class - DEVICE. 354
18.2 Error Class - OBJECT. 354
18.3 Error Class - PROPERTY. 354
18.4 Error Class - RESOURCES. 355
18.5 Error Class - SECURITY. 355
18.6 Error Class - SERVICES. 356
18.7 Error Class - VT . 357
18.8 Reject Reason . 357
18.9 Abort Reason. 358
19 BACnet PROCEDURES. 359
19.1 Backup and Restore . 359
19.2 Command Prioritization . 362
20 ENCODING BACnet PROTOCOL DATA UNITS. 366
20.1 Encoding the Fixed Part of BACnet APDUs. 366
20.2 Encoding the Variable Part of BACnet APDUs . 376
21 FORMAL DESCRIPTION OF APPLICATION PROTOCOL DATA UNITS. 390
22 CONFORMANCE AND INTEROPERABILITY . 434
22.1 Conformance to BACnet. 434
22.2 BACnet Interoperability. 435
23 EXTENDING BACnet TO ACCOMMODATE VENDOR PROPRIETARY INFORMATION . 437
23.1 Extending Enumeration Values . 437
23.2 Using the PrivateTransfer Services to Invoke Non-Standardized Services . 437
23.3 Adding Proprietary Properties to a Standardized Object. 438
23.4 Adding Proprietary Object Types to BACnet. 438
23.5 Restrictions on Extending BACnet. 439
24 NETWORK SECURITY . 440
24.1 Security Architecture. 440
24.2 Authentication Mechanisms . 441
24.3 Data Confidentiality Mechanism . 443
24.4 RequestKey Service. 444
24.5 Authenticate Service . 445
25 REFERENCES. 448
ANNEX A - PROTOCOL IMPLEMENTATION CONFORMANCE
...