BACnet Standardization at ASHRAE

Transcription

1 BACnet Standardization at ASHRAE A Status Update May 2018, Bernhard Isler, Chairman ASHRAE SSPC 135 BACnet is a registered trade mark of ASHRAE Inc., Atlanta GA, USA

2 The BACnet Committee ASHRAE Standing Standard Project Committee 135 (SSPC 135) - Maintains ANSI/ASHRAE Standard 135, BACnet - Maintains ANSI/ASHRAE Standard 135.1, Conformance Testing - Creates draft ANSI/ASHRAE Standard 223P, Designation and Classification of Semantic Tags for Building Data - Consensus standards - ANSI approved and audited standardization process, meets ISO requirements - Committee voting members are balanced among producers, users, and general interest - Informal working groups for focus areas - All contributions are by volunteers, funded outside ASHRAE is the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta GA, USA

3 Schedule & Access - Four in-person meetings per year in North America - Numerous teleconferences of working groups - Attendance not restricted, sign-in expected Past - Chicago, January 18 to 22, 2018 (ASHRAE Winter Conference) - Fort Lauderdale, April 16 to 19, 2018 (Interim, SSPC 135) Upcoming - Houston, June 21 to 25, 2018 (ASHRAE Annual Conference) - Atlanta, October 22 to 25, 2018 (Interim, SSPC 135) - Atlanta, January 10 to 14, 2019 (ASHRAE Winter Conference) - Fort Lauderdale, April 9 to 12, 2019 (Interim, SSPC 135) SSPC 135 Meetings

4 SSPC 135 Working Groups AP Application Profiles Standardized Application Profiles (e.g. VFD) DM Data Modelling BACnet XD, Web Services, System & Device Description EL Elevators Extensions for Elevator Monitoring IT BACnet IT BACnet in the future context of IT LA Lighting Application Lighting Objects, Grouping LSS Life Safety & Security Extensions for Life Safety & Security NS Network Security Network Security Architecture OS Objects & Services Objects & Services PS Protocol Stack Datalinks, Network Layer, Application Layer SG Smart Grid Smart Grid (was Utility Interaction) TI Testing & Interoperability Test Standard, Interoperability, Liaison to BTL-WG

5 Working Groups Focus Areas Higher Level Systems Smart Grid Enterprise Applications & Semantics EL-WG LSS-WG LA-WG AP-WG SG-WG DM-WG OS-WG Protocol Stack Application Layer Network Layer IT-WG PS-WG NS-WG TI-WG Datalink Layer

6 SSPC 135 in ASHRAE and ANSI ASHRAE Board of Directors (BoD) Technology Council ACCREDITED ASHRAE is accredited as American National Standards Developer (ASD) ANSI National Policy Committee (NPC) AHSRAE Standards Committee (StdC) Standard Project Liaisons Sub-Committee (SPLS) ANSI Executive Standards Council (ExSC) ANSI Board of Standards Review (BSR) LSS-WG ASHRAE Standing Standard Project Committee 135 (SSPC 135) AP-WG TI-WG LA-WG EL-WG NS-WG PS-WG DM-WG SG-WG OS-WG IT-WG Elaborated under ANSI Rules (Consensus, Balance, Reviews,... Approved as ANSI/ASHRAE Standards and American National Standards (ANS)

7 SSPC 135 and BTL ASHRAE Board of Directors (BoD) ASHRAE grants trademark rights for use in BACnet conformance testing BACnet International Technology Council AHSRAE Standards Committee (StdC) BACnet Testing Laboratories (BTL) The BACnet Institute LSS-WG ASHRAE Standing Standard Project Committee 135 (SSPC 135) AP-WG DM-WG LA-WG EL-WG NS-WG PS-WG TI-WG Conformance Testing Interpretations, Changes, Additions BTL-WG BTL Test Lab BTL Test Lab BTL Test Lab BTL Test Lab Future BTL Test Labs

8 SSPC 135 and ISO Vienna Agreement ASHRAE Board of Directors (BoD) Technology Council ASHRAE Staff Secretariat ISO/TC 205 Experts CEN/TC 247 AHSRAE Standards Committee (StdC) ASHRAE Standing Standard Project Committee 135 (SSPC 135) Change Proposals Maintenance Agency ANSI/ASHRAE Standards 135, & Addenda ISO Standards , EN ISO Standards ,

9 ANSI/ASHRAE Standard , BACnet A Data Communication Protocol for Building Automation and Control Networks - Protocol Revision 19 - Addenda bd, bi, bk, bl, bm, bn and bp in publication for protocol revision 20 - ISO :2017 Current Standards ANSI/ASHRAE Standard , BACnet Testing Method of Test for Conformance to BACnet - Conformance Test Specifications - Device Testing, not System Testing - Addenda p and r in publication - ISO :2014 ASHRAE Standards are best available through ASHRAE online bookstore

10 Proposed ASHRAE Standard 223P Proposed Standard Designation and Classification of Semantic Tags for Building Data - The purpose of this standard is to provide a dictionary of uniform semantic tags. These tags enable interoperable use of descriptive information on building data. - This standard provides a dictionary of semantic tags for descriptive tagging of building data including building automation and control data along with associated systems. - SSPC 135 assigned to create initial draft - Projected to standardize Haystack Tags, after lift to ontology - SSPC 135 AP-WG collaborates with Haystack WG551 and Brick Schema on meta-model ASHRAE Standards are best available through the ASHRAE online bookstore

11 SSPC 135, Project Haystack, Brick Schema... BoD,... TI-WG LSS-WG DM-WG PS-WG SSPC 135 LA-WG EL-WG NS-WG AP-WG Model Proposals, Tag Proposals WG #X WG #X WG #X Model Proposals, Tag Proposals Developers ANSI/ASHRAE Standard 223P Haystack Meta-Model Haystack Dictionary (defined version) ASHRAE Extensions (if needed) Published Ontology TXT CSV Published Schema TTL

12 BACnet Addenda Published Revision Current consolidated BACnet Standard ( and all Addenda to ) Also ISO

13 BACnet Addenda in Publication Revision bd Staging Object Type bi bk bl bm bn bp Audit Reporting Property Identifier Reserved Range Expansion Miscellaneous Clarifications MS/TP Enhancements Various BIBB Clarifications Tweaks to BACnet/WS Expected to be published after ASHRAE Annual Conference in Houston end of June 2018 PPRx = Publication Public Review number x APRx = Advisory Public Review number x, ISC = Independent Substantive Changes

14 BACnet Addenda in Work ap On hold AP-WG Application Interfaces & Semantic Tags bb PPR2 PS-WG MS/TP Zero-Config be PPR4 ISC LA-WG Lighting BIBBs and Device Profiles bj PPR2 IT-WG BACnet IT - BACnet Secure Connect Datalink bo PPR1 AP-WG Semantic Tags Concept for BACnet (Wait for 223P approach) bq PPR2 ISC LSS-WG Amendments to Access Control Objects br PPR1 OS-WG Miscellaneous Changes bs PPR1 EL-WG Elevator BIBBs and Device Profiles bt PPR1 LSS-WG Life Safety Enhancements and OEO Support bu PPR1 OS-WG Miscellaneous Clarifications PPRx = Publication Public Review number x APRx = Advisory Public Review number x, ISC = Independent Substantive Changes

15 Testing Addenda Published Current consolidated BACnet Testing Standard ( and all Addenda to 135.1) Also ISO o Collection of Tests

16 Testing Addenda in Publication p r EPICS Consistency Tests Miscellaneous Test Changes Expected to be published after ASHRAE Annual Conference in Houston end of June 2018 PPRx = Publication Public Review number x APRx = Advisory Public Review number x, ISC = Independent Substantive Changes

17 Testing Addenda in Work q PPR1 TI-WG Alarming Revision Test Amendments PPRx = Publication Public Review number x APRx = Advisory Public Review number x

18 Status Working Groups AP-WG - Application interfaces ( ap) - Semantic tags in BACnet ( bo) - Semantic tags for building data (ASHRAE 223P), in collaboration with Project Haystack DM-WG - Abstract data model (BACnet XD) - RESTful web services enhancements - CSML applications (e.g. new EPICS format) - Web services PICS, interoperability, testing - BACnet constrained RESTful environment web services (CoRE WS) EL-WG - Tests for elevator monitoring objects - BIBBs and device profiles for elevator monitoring ( bs) - Occupant Evacuation Operation (OEO) application interfaces

19 Status Working Groups IT-WG - BACnet IT: Use IP application protocols and IT security for BACnet (BACnet Secure Connect, bj) LA-WG - Lighting BIBBs and device profiles ( be) - Color lighting - Tests for lighting functionality LSS-WG - Tests for physical access control functionality - Occupant Evacuation Operation (OEO) additions ( bt) and application interfaces NS-WG - Network security (Clause 24) tests - Audit reporting tests (to cover bi)

20 Status Working Groups OS-WG - Interpretation requests and resolutions ( br, bu) - Testing for Timer object, COV Multiple services, etc. - Miscellaneous improvements PS-WG - MS/TP Zero-Config ( bb) - Tests for BACnet/IP and BACnet/IPv6 - Tests for Network Port object SG-WG - Use and support of ASHRAE s Facility Smart Grid Information Model (FSGIM, ASHRAE 201) in BACnet XD and BACnet/WS TI-WG - Alarming revision tests ( q) - Tests, with BACnet International s BTL-WG, and other working groups

21 BACnet/IPv6 BACnet over IPv6 ( , Annex U)

22 BACnet over IPv6 BACnet/IPv6 BACnet Application BACnet Application Layer - BACnet Virtual Link Layer on UDP - Virtual MAC (3 octet) for upper layers and remote devices - IPv6 unicasts for BACnet unicasts - IPv6 multicasts for BACnet broadcasts - BBMDs for IPv6 for relaying BACnet broadcasts among multicast domains and Foreign Devices D RTR D D D RTR BACnet/IPv6 Multicast Domain D D D BACnet Datalink & Physical Layers BBMD BACnet Network Layer... MS/TP BACnet/IP BACnet/IPv6... RS485 UDP/IPv4 UDP/IPv6 BACnet/IPv6 Multicast Domain D D BBMD D Other Multicast Domain FD BBMD D D = BACnet Device FD = B/IPv6 Foreign Device BBMD = B/IPv6 BBMD RTR = BACnet Router BACnet/IPv6 Multicast Domain D

23 BACnet for Elevator Monitoring ( , in Clauses 12 & 13) Elevator Monitoring

24 Elevator Monitoring Elevator Monitoring New object types to represent: - Elevator Groups - Lifts (Elevators) - Escalators - Status indication & control - Alarming Enhanced Change-Of-Value Reporting Change-Of-Value Multiple Elevator Group Elevator Group Lift Lift Elevator Group Escalator Escalator Lift (Higher Deck) Lift (Lower Deck) Lift (Higher Deck) Lift (Lower Deck) COV Multiple Reporting

25 BACnet XD BACnet Abstract Data Model ( , Annex Y) Data From Modbus registers to BACnet objects to Arbitrary Data and Metadata Data Data Data Metadata Data Metadata Data Metadata /path/to/data/data /path/to/data/data/$metadata Data Data Metadata Data

26 BACnet XD BACnet Extended Data Model - Data and Metadata - Defined Base Types - Defined Standard Metadata - Arbitrary Structures - Multiple Trees - Linking and Referencing - Semantic Information - Multi-Media - Addressed by URI Path - Fully Discoverable - Machine Readable Definitions Sequence, Composition, Object, List, Array, SequenceOf, Collection, Choice Example in CSML: 'displayname', 'description', 'comment', 'namedvalues', 'namedbits 'units', 'minimum', 'maximum', ', ', BitString, Boolean, 'resolution Date, DatePattern,, 'tags', DateTime, DateTimePattern, 'valuetags' Double, Enumerated, Integer, Link, ObjectIdentifier, ObjectIdentifierPattern, OctetString, Raw, Real, String, StringSet, Time, TimePattern, Unsigned, <Definitions> <Sequence overlays="0-bacnetdeviceobjectreference"> WeekNDay <ObjectIdentifier name="deviceidentifier"> <DisplayName locale="es">identificador del Dispositivo</DisplayName> </ObjectIdentifier> <ObjectIdentifier name="objectidentifier"> <DisplayName locale="es">identificador del Objeto</DisplayName> </ObjectIdentifier> </Sequence> </Definitions>

27 BACnet XD Primitive Base Types - Exclusive set of primitive types - Derived type definitions possible - Canonical representation as defined in XML Schema, used both in JSON and XML BitString, Boolean, Date, DatePattern, DateTime, DateTimePattern, Double, Enumerated, Integer, Link, ObjectIdentifier, ObjectIdentifierPattern, OctetString, Raw, Real, String, StringSet, Time, TimePattern, Unsigned, WeekNDay

28 BACnet XD Data Complex Base Types Data Data Metadata Metadata - Sequence - Composition, Object, Property, Point - List, Array, Unknown - SequenceOf - Collection - Choice - Null - Any Data Data Data Metadata Data Data Metadata Data Complex base types can contain complex base types Arbitrary complex data structures possible All data and metadata is of a base type.

29 BACnet XD Common Standardized Metadata - Type definition references - Instance identifications - Semantic tags - Descriptions and documentation - Links and references - Accessibility & restrictions - Presence requirements - Status and quality of data - Authorization elements - Data history Data can have metadata Metadata can have metadata Standardized set of metadata Proprietary metadata possible Metadata includes machine readable discovery information (Additional standard metadata in BACnet RESTful Web Services)

30 BACnet XD Semantic Tags Metadata Tags - Marker tags - Presence of tag classifies the data Value Tags - Tag including a value - Presence of tag classifies the data - The value provides additional information Use of arbitrary dictionaries Standard dictionaries Common dictionaries Vendor dictionaries Site dictionaries Dictionary of tag identified in each tag. Mixed dictionaries possible

31 BACnet XD Semantic Tags Dictionaries - Arbitrary dictionaries possible - Tags indicate their dictionary in a prefix. - Tag descriptions in BACnet XD - BACnet Vendor ID Prefix: <Vendor-ID> - <Tag Name> 0-air, 555-outside, 876-chiller - Reverse DNS Prefix: <Reverse DNS Name>. <Tag Name> org.example.ahu, org.knx.fb_vav Use of arbitrary dictionaries Dictionary of tag identified in each tag. Dictionary may include marker tags and value tags.

32 BACnet XD Semantic Tags in BACnet Objects ( , Clause 12) - New Tags property for semantic tags in each object type - New Subordinate_Tags property for semantic tags of subordinates in Structured View object - Marker tags and value tags - Same tags and rules as in BACnet XD - Arbitrary dictionaries possible - Mix of dictionaries Structured View Subordinate_Tags Tags Tags Tags BACnet Object Tags BACnet Object Tags

33 BACnet XD BACnet Object BACnet XD Device Descriptions ( , Annex X) - Properties for profile name and profile location in all BACnet objects - Machine readable BACnet XD based description of definitions and data in XML or JSON - Subset of BACnet XD used for description of BACnet Devices, Objects and Properties - Type Definitions - Instantiated Data and Metadata - Semantic Tags - Virtual Views Profile Name Profile Location BACnet XD XDD File - Located in device itself, or on some server - Referencing and inclusion among XDD files

34 BACnet/WS BACnet RESTful Web Services ( , Annex W) Server Device Data Data Metadata Metadata Data Data Metadata Data Data Data Metadata Data

35 BACnet/WS BACnet RESTful Web Services - REST style API to BACS Information - HTTPS and OAuth Full access to BACnet XD Data and Metadata - Full discovery of Data and Metadata - Event and Change-Of-Value Subscriptions - Queries and Filters - Localized data, in multiple locales HTTP Request BACnet RESTful Web Services Server HTTP Response - JSON, XML or Plain Text Representation Formats { "$base":"composition", "$nodetype":"equipment", "$displayname":"example Co. Air Handler, Single Duct with AC2 Mixed", "Mixed_Air_Temp": { "$base":"real", "$variability":"status", "$displayname":"mixed Air Temperature", "$units":"degrees-fahrenheit" }, "Min_Outside_Air": { "$base":"real", "$units":"percent", "$writable":true, "$variability":"config }, } <?xml version='1.0' encoding='utf-8'?> <Composition xmlns=" nodetype="equipment" displayname="example Co. Air Handler, Single Duct with AC2 Mixed" > <Real name="mixed-air-temp" variability="status" displayname="mixed Air Temperature" units="degrees-fahrenheit"/> <Real name="min-outside-air" units="percent" writable="true" variability="config /> </Composition >

36 BACnet/WS Information Security Certificate Authority - HTTPS - Mutual authentication - TLS, PKI, x509 certificates Client HTTPS Server Device - OAuth 2.0 for Authentication & Authorization - Authorization of devices and users - Central Identity and Access Management - Authorization Server issues authorization tokens - Server Device checks token, not identity Client Mutual Authentication Authorization Server Server Device

37 BACnet/WS Server Device Data Structures - Server device information - Data directory - Security configuration - Data Definitions - Subscriptions - Application Trees - Multi-access contexts - Standard BACnet protocol mapping - Other protocol mappings as available Full BACnet XD usage Predefined structures for defined data Arbitrary application trees Defined BACnet site, device, and object mapping and representation

38 Audit Reporting (Addendum bi) Audit Reporter Object - Generates Audit Notifications - At source of operation (Client) - At target of operation (Server) - Configuration of operations to be logged Audit Log Object - Logs and optionally forwards Audit Notifications - Hierarchy of Audit Log objects - Standard log buffer ReadRange access - Audit Query log buffer access - Support of extremely large buffers - Forwarder Audit Log objects buffer notifications before forwarding Audit Notification Service - Confirmed or unconfirmed notification service - Conveys all data related to an operation - Used by operation source and target Audit Log Query Service - Query for audit records in an audit log buffer - Queries for operation targets - Queries for operation sources - Returns audit log records as per the query parameters Audit Query Audit Query Results Intermediary Audit Log Device Audit Log (Forwarder) Client Audit Reporting Audit Reporter (Source) Audit Log (Logger) Audit Log Device Operation Audit Log Storage Audit Notifications Audit Log (Forwarder) Audit Reporter (Target) Controller

39 BACnet Secure Connect Virtual Datalink BACnet/SC, or B/SC BACnet IT BACnet Application BACnet Application Layer - New datalink layer option in BACnet stack - Virtual Hub-and-Spokes model - Direct connections optional - Redundancy concept for hubs - VMAC addressing of nodes of the B/SC network - Use of secure WebSocket connections (spokes) to hub and to other nodes (direct connections) - IT grade security, TLS, mutual authentication - Advanced structures possible using B/SC to B/SC BACnet Routers BACnet Datalink & Physical Layers Node BACnet Network Layer... MS/TP BACnet/IP BACnet/SC... Node RS485 UDP/IPv4 WebSockets Node Hub Node Node Node Node Node Node

40 BACnet Secure Connect BACnet Secure Connect Virtual Datalink IP Centric View: - All of BACnet is an Application, including the BACnet/SC BACnet Datalink - WebSockets is the Application Layer - TLS & TCP build the Transport Layer - IP or IPv6 is the Internet Layer - At Link Layer, any datalink technology possible that supports IP or IPv6: Ethernet, WLAN, 4G/5G,... Application Application Layer Transport Layer Internet Layer Link Layer BACnet Application BACnet Application Layer BACnet Network Layer BACnet/SC WebSockets / HTTP TLS V1.2 TCP IP / IPv6 Any Datalink for IP or IPv6

41 BACnet IT BACnet/SC Network Security Certificate Authority - Secure WebSockets - Mutual authentication - TLS, PKI, x509 certificates - Certificate management and security bootstrapping - Hardware security module support BACnet/SC Device Secure WebSocket Mutual Authentication BACnet/SC Device = BACnet/SC Packets Conveying BACnet NPDUs