BACnet协议标准2008年版-英文原版

BACnet

2008

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ANSI/ASHRAE 135-2008 i

CONTENTS

FOREWORD ………………………………………………………………………………………………………………….vii

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

ii ANSI/ASHRAE 135-2008

11.3

Mapping the LLC Services to the LonTalk Application Layer ......................................................................... 126

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

ANSI/ASHRAE 135-2008 iii

15.4

DeleteObject Service ...................................................................................................................................... 342

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

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