What is BACnet? · Ben Dorsey BACnet International Marketing Committee Picture ... • The standard...
Transcript of What is BACnet? · Ben Dorsey BACnet International Marketing Committee Picture ... • The standard...
BenDorseyBACnetInternationalMarketingCommittee
Picture
• WhatisBACnet?• TheBusinessCase/ValueProposition• WorkingwithBACnet• TheFutureofBACnet• SuccessStory(iftimepermits)
WhatisBACnet?
• Anopenstandard• Adatacommunicationsprotocol• Anacronym:BuildingAutomationandControl
Networks• Ameansofautomatingbuildingsand
integratingbuildingsystems• AregisteredtrademarkofASHRAE!
®
BACnetisadatacommunicationsprotocolandanagreed-uponsetofrulesforcreatinginteroperablenetworksofbuildingsystems.
• HVACequipmentandterminalunits
• Lightingsystems• Accesssystems• SecurityandCCTV• Lifesafety• Renewableenergysources• Windowsandshading
• Parkingfacilities• Irrigation• Smokecontroldoors&
dampers• Massnotification• Elevators• Emergencypower
• Aworkinggroup(standardprojectcommittee)oftheAmericanSocietyofHeating,RefrigeratingandAir-ConditioningEngineers(ASHRAE).
• Beganworkin1987undertremendousopposition(somesaiditwouldNEVERbedone).
• Publishedasastandardin1995.• SupportedandmaintainedbyASHRAEStandingStandard
ProjectCommittee• (SSPC)135.
• Bydesign,thestandardisundercontinualrevision.
• It’salsoanANSIandISOstandard
Objects• Thestandardusesanobject-orientedmodeltorepresent
information.• Definesmorethan50standardobjects• Manufacturerscancreatenon-standardobjects
ProductmanufacturerscombineobjectstocreateDevices
Services• Standardalsobuiltonanapplicationservicesmodel• ThinkofservicesasthemessagesthatBACnetdevices
sendtoeachother.• Someservicesreadandwritepropertiesofoneor
moreobjects.• Otherservicessendnotificationof– alarmsorspecialevents.• Stillotherservicesreadandwritefiles.
Services• Again,implementerscanpickandchoosewhichservicesto
incorporateintoDevicefunctionality• Groupedinto
• Objectaccess• Alarmandeventmanagement• Scheduling• Trending• Files• Deviceandnetworkmanagement
Devices(orDeviceProfiles)• DefinedbyObjectsandServicessupported
• OperatorWorkstations(B-AWS,B-OWS,B-OD)
• Controllers(B-BC,B-AAC,B-ASC,B-SS,B-SA)
• Miscellaneous(B-RTR,B-GW,B-BBMD,B-GEN)
Inessence,thestandarddefinesthemessagesthatdevicesexchangeandhowtheyaredelivered.
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message transport
BACnet/IP
MS/TP
COST
SPEED
• Itcanbeimplementedonlow-costnetworks(dedicatedorshared)andisextremelyflexibleinLANtypes.
• BACnetdevicesarecost-competitivewithlong-standingproprietarydevices.
• Thestandardspecificallyprovidesforscheduling,trending,andalarming.
• Itiseasilyscalableatalllevelsforanysizejob.
• Itiscompletelyopenandnotdependentonspecifichardware.
• Itprovidesforautomaticdevicediscovery(savinginstallationcosts).
• BACnetisnot“plug-n-play.”
• BACnetdoesnotreplacetheneedforDDCorcontrollogicanddoesnotattempttostandardizehowdevicesareprogrammed.
• BACnetdoesnotreplacetheneedforspecifyingwhatauserwantsorneeds.(Itsimplyprovidessomestandardizedtoolstohelpenablethecreationandspecificationofsystemsthat
• caninteroperate.)
TheBusinessCaseandValueProposition
• Asdigitalcommunicationsemergedinthecontrolsspace,company-specific(orproprietary)languagesweredevelopedbymanufacturers.
• Theyworkedandworkedwell.Theyjustdidn’tplaywellwithothers.
Considerthehiringchallengeoftryingtofindqualifiedoperatorsandtechnicians.
• ThosefamiliarwithBrandXmaybeinshortsupply.• MeanwhilethebestcandidatesmaybefamiliarwithBrandY
andBrandZbuthavenoexperienceonX.• Andwhentheexternalserviceprovideristheonlygamein
town,Icanbeheldhostage.• HowlongwillItoleratethat?
• Aproprietarysystemjoinsmeatthehiptoasingleproductmanufacturerand,perhaps,asinglemanufacturer’srepresentative.
• Ifmycontrolstrategyneedstochangeinlightofbuildingdynamics,willIreceivethenecessaryresponsiveness?
• Today’sautomationsystemshavetoplaywellintheentireenterprise.
• Lessandlessaretheystandaloneentitiescontrollingyourmechanicalsystems,forexample.
• Integrationofsystemsisbecomingmorenecessaryduetoincreasedefficiencyandtheneedtohaveaccuratedataacrosstheenterprise.
• Frequently,enterprisesystemsorenergymanagementadd-ons,suchasdashboards,willwanttopulldatafromtheBAS.
• Whenthecommunicationprotocolisproprietary,thesharingofsuchdatabecomesproblematic.
“Aftersevenyears,BASbecomeverydifficulttosupportandwithproprietarybasedcontrolnetworks,canbemadetobefunctionallyobsoletebybeingincompatiblewiththenextgenerationproductlines.”RaedSalem,DirectorofMEPEngineeringforChicagoAEfirm,LarsonandDarbyGroup
ChoiceofProviders:• ASHRAEissuesvendoridentificationnumbersto
companieschoosingtodevelopBACnetproducts.
• ThetotalnumberofvendorIDssurpassed800bythebeginningof2015;nowexceeds950!
• Thatmeanstherearemorethan950businessesouttheredevelopingproductsthatcaninteroperate.
Device-to-devicecompatibility• Speakthesamelanguage
• Havethesameinterests
• Gotothesameplaces
• Havematchingsweaters
• WhileBACnet,asastandard,isundercontinuousdevelopment,itsverynatureisoneofbackwardscompatibility.
• Acontrollerofageneration1willcontinuetoperformitsassignedfunctionsevenascontrollersofgeneration2areaddedtothenetworkorassoftwareofgeneration2assumesnetworkmanagement.
• Thesameistrueforgeneration1ofBrandXandgeneration2ofBrandY.
RaedSalemcontinues:
“Thisissueisdependentonwhethertheexistingsystemisbasedonanopencontrolnetworkstandardorisavendorproprietarycontrolnetwork.Aworstcasescenariowouldbefortheproprietarycontrolnetworkrequiringcompletereplacement(100percent)andabestcasescenariowouldbenosystemreplacementwiththeopenstandardsbasedcontrolnetwork(becauseofexistingsystemcompatibilitywiththenextgenerationBAScomponents).”
BACnetisanintegrationengine.• Systemsareofteninterrelated
• Considerbuildingaccessandoccupancy-basedlightingandHVAC
• Synergiescanberealizedsuchasthelearningofoneuserinterfaceversusseveral
• HVACequipmentandterminalunits
• Lightingsystems• Accesssystems• SecurityandCCTV• Lifesafety• Renewableenergysources• Windowsandshading
• Parkingfacilities• Irrigation• Smokecontroldoors&
dampers• Massnotification• Elevators• Emergencypower
WorkingwithBACnet
Contractors/ServiceProviders• “TheControlsContractorshallsupplyandinstalla
completeBuildingAutomationSystem(BAS)asrequiredtoaccomplish...”
• “BuildingAutomationSystem(BAS)shallconsistofnativeBACnet...”
• Thestandarddoesnotstipulatehowdevicesaretobeconfiguredorprogrammed.
• Thatmeansthateachmanufacturercanhaveitsownprogrammingtool.
• Canstillbebroughtunderasingleoperatorworkstationoruserinterface.
• Mappingpointsfromonebrandofdevicestoanothercanbetedious.
• BACnetstandardprovidesformanufacturerstoimplementtheirownspecialcapabilitiesthroughtheuseofproprietaryobjects&properties.
• Somebetterthanothersatusingstandarddatatypestopromoteinteroperability.
• Sometimes,somuchproprietaryactivitygoingonthattrueinteroperabilityis
• thwarted.
• Majorcontrolsmanufacturersprovidetrainingtocontractingpartners.
• Especiallyimportantfortechnicians.
• And,forin-housefacilityprofessionals,considertheextenttowhichyouwanttobetrained:
• Changingschedules• Modifyingoraddinggraphics• Etc.
• www.bacnetinstitute.org• Free,butmustregister• Courses,articles,presentations,and
acommunity(forum)
• Community:(a)AskandExpertand(b)TechnicalForum
• Devicelogs,filecaptures,historyreports• Trendsandlogsprovideinformationfor
furtheroptimizationofthesystemaswellasfordocumentationrequirementsforbuildingcertification.
• BACnetnetworkbrowsers
• Communicationwirecaptures
TheFutureofBACnet
• Hardwareandsoftwareformonitoringandcontrollingvariousbuildingsystems.
• Thelow-hangingfruitofbuildingintelligence.
IoBT,theInternetofBuildingThings• DevicetoenterpriseconnectivitythroughIPand
wireless• Sensors,sensors,sensors• Meters,meters,meters• Mobileapps
Bringingtogetherautomatedsystems.• Typicallythroughacommonuserinterface• Alsothroughsupervisorycontroldevices
IoBT,theInternetofBuildingThings• Data,Data,Data• Moremeasurement&verification• Cyberthreatsandcyberprotection• AnewgenerationofIT-savvysystemintegrators
Ameansofvisualizingandinterpretingallofthatdata
It’strendy!“Theuseofdataanalyticsorpredictiveanalyticsallowsorganisationstoefficientlyextract,cleanandstandardisedatafrommultipleoperationalandlegacysystems,aswellasdatainthepublicdomain,todeliverrealinsightstobusinessstakeholders.”
Deloitte
• Startswithattractivegraphicalrepresentationofbuildingsystemsandoperatingparameters.
• Movesontodashboards.
• Culminatesinintelligentanalysis;portendingoptionsorrecommendingcoursesofaction.
IoBT,theInternetofBuildingThings• Trulyactionableanalytics• Customizedandcustomizableviews• Thecloud• Strangebedfellows
SSPC135WorkingGroupsdrivecontinuousdevelopmentofthestandard
• WorkingGroupsincludeInformationTechnology,NetworkSecurity,andSmartGrid,andDataModeling,amongothers
ProductManufacturers&Developers• Justvisitthebuildingautomationand
controlsshowcasehereattheshow.