Protocolli per la domotica BACnet - uniurb.it · Domotica ed edifici intelligenti – Università...

Corso “DOMOTICA ED EDIFICI INTELLIGENTI” – UNIVERSI TA’ DI URBINODocente: Ing. Luca RomanelliMail: [email protected]

1

Protocolli per la domotica

BACnet

Domotica ed edifici intelligenti – Università di Urbino

BACnet BACnet BACnet BACnet ---- Introduction BACnetIntroduction BACnetIntroduction BACnetIntroduction BACnet

Domotica ed edifici intelligenti – Università di Urbino

Who is behind BACnet?

Domotica ed edifici intelligenti – Università di Urbino 3

BACnet structure:Main elements of BACnet

Objects represent data and functionality

Services assign tasks, give

BACnet Objekt

SequenzRegler

AnalogInput

BinaryOutput

AnalogInput

Device

T

Schedule


Services assign tasks, give commands, exchange data

Busses andnetworks

transport the data

Functions interactions of multiple objects

� Each BACnet device contains a setof so-called "BACnet objects "

� BACnet objects represent the parts of aplant

BACnet Device (e.g. DESIGO PX)

Sequence

Analoginput

Analoginput

Device

T


plant

� More than 20 standard BACnet objects have already been defined for buildingautomation and control applications(HVAC, fire, security, ...)- others will follow

BACnet object

Sequencecontroller

Binaryoutput

Schedule

What is a BACnet object?

• BACnet uses an object-oriented approach for the network view of a device.

Object:

Over 20

• An "object" (e.g. analog output) has a set of "properties" (e.g. operating limit,

status, etc.) and represents a functional behaviour.


standardobjects

• Each object has a unique object_identifier within a device.

• The device object, however, has an object_identifier that is unique system-

wide.

Structure of a BACnet object

• A BACnet object consists of a set of properties.Property :

Required

Optional

Proprietary

• A property of an object is either REQUIREDREQUIREDREQUIREDREQUIRED or OPTIONALOPTIONALOPTIONALOPTIONAL.

• Properties are used to parameterise the object's

functionality and present the results.


• A property of an object is either REQUIREDREQUIREDREQUIREDREQUIRED or OPTIONALOPTIONALOPTIONALOPTIONAL.

• The Object_Identifier, Object_Name and Object_Type properties are mandatory in every object.

• The data type of a property can either be simple (e.g. integer, string), or it can have a complex

structure.

• The definition of proprietary objects and proprietary properties is permitted and governed by the

BACnet standard.

� Description of a BACnet device's major objects:

� Device Object (this is MUST!)

Standard objects

• Mapping of process values and calculated values:

Analog, multistate and binary input objectsAnalog, multistate and binary input objectsAnalog, multistate and binary input objectsAnalog, multistate and binary input objects

Analog, multistate and binary output objectsAnalog, multistate and binary output objectsAnalog, multistate and binary output objectsAnalog, multistate and binary output objects


• Description of a command sequence:

Command objectCommand objectCommand objectCommand object

Analog, multistate and binary output objectsAnalog, multistate and binary output objectsAnalog, multistate and binary output objectsAnalog, multistate and binary output objects

Analog, multistate and binary value objectsAnalog, multistate and binary value objectsAnalog, multistate and binary value objectsAnalog, multistate and binary value objects

• Handling of weekly schedules and exception schedules:

Scheduler objectScheduler objectScheduler objectScheduler object

Calendar objectCalendar objectCalendar objectCalendar object

� Flexible event and alarm handling of any property content:

EventEnrollment object

Standard objects (continued)

• Time and receiver dependent event and alarm distribution in the system:

NotificationClass objectNotificationClass objectNotificationClass objectNotificationClass object

• Read and write large quantities of data:

File objectFile objectFile objectFile object


• Representation of an application program:

Program objectProgram objectProgram objectProgram object

File objectFile objectFile objectFile object

• Grouping of objects and properties in a devicedevicedevicedevice:

Group objectGroup objectGroup objectGroup object

• Representation of any closed-loop control block:

Loop objectLoop objectLoop objectLoop object

• Grouping of objects and properties in a networknetworknetworknetwork:

Global Group objectGlobal Group objectGlobal Group objectGlobal Group object

� Generating the average, minimum and maximum value of a monitored data point:

� Averaging object

Standard objects (continued)

• Logging of any data point:

Trend Log objectTrend Log objectTrend Log objectTrend Log object


• Other objects:

Pulse Converter Pulse Converter Pulse Converter Pulse Converter

Object Accumulator Object Object Accumulator Object Object Accumulator Object Object Accumulator Object

Trend Log MultipleTrend Log MultipleTrend Log MultipleTrend Log Multiple

Life Safety PointLife Safety PointLife Safety PointLife Safety Point

Life Safety ZoneLife Safety ZoneLife Safety ZoneLife Safety Zone

Required for all BACnet

The device object - the ID card of a BACnet device

Property Identifer Property Datatype Conformance CodeObject_Identifier BACnetObjectIdentifier RObject_Name Character String RObject_Type BACnetObjectType R

R=RequiredO=Optional


Required for all BACnetobjects

Siemens Building Technologies

Object identifier: 00000001 000001Object name: System controllerObject type: 1 device

Identity Card for DESIGO PX

IDD<<Systemcontroller<<DESIGO PX<<<<DEVICE<<<<<<<<<<<<348794003D<<0010040<0701196<<<<<<<<<<6<<<<<<<<<<<<<<<

• Unique, system-wide identification• One device object per BACnet device• 222 devices system-wide• Mapped to a 32 bit number

Object type Entity number10 bits 22 bits

Device object (continued)

Property Identifer Property Datatype ConformanceCode

Object_Identifier BACnetObjectIdentifier RObject_Name Character String RObject_Type BACnetObjectType RSystem_Status BACnetDeviceStatus RVendor_Name CharacterString RVendor_Identifier Unsigned16 RModel_Name CharacterString RFirmware_Revision CharacterString RApplication_Software_Version CharacterString RLocation CharacterString ODescription CharacterString OProtocol_Version Unsigned R


Protocol_Services_Supported BACnetServicesSupported RProtocol_Object_Types_Supported BACnetObjectTypesSup ported RObject_List BACnetARRAY[N] of BACnetObjectIdentifier RMax_APDU_Length_Accepted Unsigned RSegmentation_Supported BACnetSegmentation RVT_Classes_Supported List of BACnetVT Class O 1

Active_VT_Sessions List of BACnetVT Session O 1

Local_Time Time OLocal_Date Date OUTC_Offset INTEGER ODaylight_Savings_Status BOOLEAN OAPDU_Segment_Timeout Unsigned O2

APDU_Timeout Unsigned RNumber_of_APDU_Retries Unsigned RList_of_Session_Keys List ofBACnetSessionKey OTime_Synchronisation_Recipients List of BACnetRecipi ent O3

Max_Master Unsigned(1..127) O4

Max_Info_Frames Unsigned O4

Device_Address_Binding List of BACnetAddressBinding R

BACnet standard objectsDevice object

The device object contains the following functions and information:

� Vendor and identification (SBT has Vendor ID= 7)� Descriptive texts� BACnet firmware version, application SW versions� System status� Transmission status


� Date and time� Coordinated universal time (UTC) offset� Daylight saving time changeover

� BACnet address list of all other BACnet objects inside the BACnet device� Maximum number of nodes on the network� ... + proprietary extensions

Analog output object

Property Identifer Property Datatype ConformanceCode

Object_Identifier BACnetObjectIdentifier RObject_Name Character String RObject_Type BACnetObjectType RPresent_Value Real RDescription CharacterString ODevice_Type Character OStatus_Flags BACnetStatusFlags REvent_State BACnetEventState OReliability BACnetReliability OOut_Of_Service BOOLEAN R

Representationof the

process data


Out_Of_Service BOOLEAN RUnits BACnetEngineeringUnits RMin_Pres_Value REAL OMax_Pres_Value REAL OResolution REAL OPriority_Array BACnetPriorityArray RRelinquish_Default REAL RCOV_Increment REAL O1

Time_Delay Unsigned O2

Notification_Class Unsigned O2

High_Limit REAL O2

Low_Limit REAL O2

Deadband REAL O2

Limit_Enable BACnetLimitEnable O2

Event_Enable BACnetEventTransitionBits O 2

Acked_Transitions BACnetEventTransitionBits O 2

Notify_Type BACnetNotifyType O2

O1 - this property is required if the object supports COV reporting

O2 - these properties are required if the object supports intrinsic reporting

Standard BACnet objectMapping of process values and calculated values

Analog inputAnalog outputAnalog value

Binary input


Binary inputBinary outputBinary value

Multistate inputMultistate outputMultistate value

Standard BACnet objectAnalog input, overview of functions

� Addressing (address)

� Output of the present measured value (present value)

� Idle function with backup value handling (out of service, default value)

� Alarms and changes of state

� Configuration of alarms and changes of state(event enable, alarm enable, high limit, low limit, neutral zone, time delay, notification class)


notification class)

� Reporting of alarms and changes of state(alarm state, status flag, event state, event time stamp)

� Alarm acknowledgement(reset, acked transition, time of acked, ack initials)

� Block state reporting (reliability)

Standard BACnet objectProcess value mapping

Analog inputAnalog outputAnalog value

Binary input


Binary inputBinary outputBinary value

Multistate inputMultistate outputMultistate value

Standard BACnet object Binary output, overview of functions 1

� Addressing (address, feedback address)

� Process value processing and output(program value, program enable, present value, polarity)

� Force/overwrite value(operator value, operator enable, priority array)


� Idle function with backup value handling(out of service, default value)

� Feedback signal (feedback value)

Standard BACnet object Binary output, overview of functions 2

� Alarms and changes of state

� Configuration of alarms and changes of state(event enable, alarm enable, time delay, notification class)

� Signalisation of alarms and changes of state(alarm state, status flag, event state, event time stamp)

� Alarm acknowledgement


� Alarm acknowledgement(reset, acked transition, time of acked, ack initials)

� Block state signalisation (reliability)

Operating hours

� Configuration(operating hours enable, operating hours limit, expiration date)

� Display and signalisation (operating hours, total operating hours)

Standard BACnet Object Binary output, operating hours

Operating hours Total operating hours

System event


t

Operating hours limit

Operating hours event

System event

Reset operating hours

Current operating hours Reset total operating hours

Expiration date

BACnet structureMain elements of BACnet



BACnet Objekt

SequenzRegler

AnalogInput

BinaryOutput

AnalogInput

Device

T

Schedule


Servicescommands, exchange data

Busses andnetworks

transport the data


Models: client/server relationship

� The client uses the services provided by the server

Client/server

The The The The clientclientclientclient

subscribes to changes of value

assigns trend logging tasks

Please?


Client/serverrelationship

The The The The serverserverserverserver

contains a map of the device function and executes the

requested services on it

assigns trend logging tasks

sets alarm limits

Application layer services arebased on the client/server model

� Types of communication used by BACnet:� Peer-to-peer communication (e.g., Toutside can be exchanged between two BACnet devices)

� Connectionless� Unconfirmed Services: (Service primitives)

� UNCONF_SERV.request - UNCONF_SERV.indication

� Confirmed Services: (Service primitives)

� CONF_SERV.request - CONF_SERV.indication


� CONF_SERV.confirm - CONF_SERV.response

request

confirm

indication

response

� 38 application layer services

BACnet services

• 6 service classes

Alarm and event services

File access services


• Proprietary services

File access services

Object access services

Remote device management services

Virtual terminal services

Network security services

Client/serverrelationship

� 9 alarm and event related services

� AcknowledgeAlarm

� Confirmed and UnconfirmedCOVNotification

� Confirmed and UnconfirmedEventNotification

BACnet services (continued)


� Confirmed and UnconfirmedEventNotification

� GetAlarmSummary

� GetEnrollmentSummary

� SubscribeCOV

� LifeSafetyOperationService

• 2 file access services

AtomicFileRead

AtomicFileWrite

� 10 object access services for access to and manipulation of object properties

� AddListElement

� RemoveListElement

� CreateObject

� DeleteObject

� ReadProperty


Bread


� ReadProperty

� ReadPropertyConditional

� ReadPropertyMultiple

� WriteProperty

� WritePropertyMultiple

� ReadRange

� 2 network security services

� 12 remote device management services

� DeviceCommunicationControl

� Confirmed and UnconfirmedPrivateTransfer(for proprietary services)

� Confirmed and UnconfirmedTextMessage



� Confirmed and UnconfirmedTextMessage

� ReinitializeDevice

� TimeSynchronisation

� UTCTimeSynchronisation

� WhoIs/Iam

� WhoHas/IHave

� 3 virtual terminal services

Extendability of the BACnet protocol

� The BACnet protocol is designed such that it can be extended at any time:

� Extensions by the BACnet standard committee(SSPC-135)

� Proprietary extensions by vendors


� The following extensions can be made:

� Objects: new objects and/or properties� New services

This makes BACnet a safe investment for the future!

BACnetBACnetBACnetBACnet

AAAA DESIGO TopologyDESIGO TopologyDESIGO TopologyDESIGO Topology

IP

RouterI*net

INSIGHT INSIGHT INSIGHT

WEB

Browser

BACnet

Router

BACnet

Router

PX-WEB

INSIGHTPXM20

3rd

DESIGO WEB

(Web-Server)


PXC-U PXR PXCPXE

PX-WEB

RXC RXC

RXC RXC RXCQAX

QAX

I/O-Module

I/O-Open

3rd

3rd

3rd

3rd

DTSDTSDTSDTS

3rd

PXC-U

I/O-Module

I/O-Open

3rd3rd3rd

M-Bus

Mod

Bus

QAX QAX

BACnetBACnetBACnetBACnet

BACnet ExampleBACnet ExampleBACnet ExampleBACnet Example

� PXM20 needs the current value from the BACnet Object AI (Analog Input)

• AI has various Properties


AIAIAIAI

• One of the Properties of the AI is its Present

Value

• We make use of the Read_Property Service



Services assign tasks, give

BACnet Objekt

SequenzRegler

AnalogInput

BinaryOutput

AnalogInput

Device

T

Schedule



Busses andnetworks

transport the data


Functions:BACnet change of value (COV) reporting

� Permits one or more clients to permanently or temporarily subscribe to changes of value on a server

• The list of subscribers is not visible over the network

• COV notification is based on fixed criteria:

If the present_value changes by the


File Edit App lications Settings Help

Date: 2. 9. 94Tim e: 14:45

User : MullerLevel: 3

Unacknowledged al arms: 1High priority al arms : 3

2 1.0 C

2 2 . 4 C2 3 2 P

0 %7 5 %

O ff

O n

O ut site : 2 9.5 C

7 5 %

2 2. 4 C

On

MS60 - Shell

SubscribeCOV

COVNotification

COV Client

COV Server

File Edit App lica tions Settings Help

Date: 2. 9. 94Time: 14:45


Unacknowledged al arms: 1High priority al arms : 3

21 .0 C

2 2 . 4 C2 3 2 P

0 %7 5 %

Of f

O n

O uts ite : 2 9.5 C

7 5 %

2 2. 4 C

O n

MS60 - Shell

COV Clientorororor

If the status flag changes

• Standard analog, binary, multistate

and loop objects can support

COV reporting

If the present_value changes by the

value specified in the "COV_increment"

Example of COV handling

BACS BACS Operating device

BUS Input

Ref

Analog Output Block Z Block A

PD

COV Client

COV Client

Management Level


Analog Input Analog Output

Block B Block Q

Block V

Binary Input Binary Output

Ref

BUS Input

Ref

BUS Input

Ref

PD

Client

COV

Server

COV Server

Automation

Level

Example of COV handling

1. The client subscribes to a value (data point) of the server.

2. The server acknowl-edges and then

sends the value immediately.

COV Client

Router Router

File Edit Applications Settings Help

Date: 2.9.94Time: 14:45


Unacknowledged alarms: 1High priority alarms : 3

21.0 C

2 2 . 4 C2 3 2 P

0 % 7 5 %

Off

O n

Ou t sit e : 2 9 .5 C

7 5 %

2 2 .4 C

On

MS60 - Shell

1

1

2


4. The client renews or

withdraws the subscription.

sends the value immediately.

3. The server sends the value whenever

it changes.

COV Server COV ServerCOV Client

2

3

41

34

Functions:Time-dependent switching

� The time-dependent switching function is:� dependent on date, weekday, time of day� unless the current date corresponds to an entry in the exception list

BACnet realises this function with two objects:


BACnet realises this function with two objects:

The schedule objectschedule objectschedule objectschedule object provides a weekly schedule

List of switching times with values (binary, analog, multistate)

Link to the objects to be influenced

Exception list also with switching times and values

The calendar objectcalendar objectcalendar objectcalendar object is a list of exceptional days

It can be referenced by the exception list in the schedule object

� Linking of schedule object and commanded objects via references

BACnet scheduler objects

• The commanded objects can be local (in the same device as the schedule object) or in a different device on

the network.

The schedule objectschedule objectschedule objectschedule object plays the central role!


Analog ValueObject

CalendarObject

Commanded Object Exception Period

ScheduleObject

Schedule Object

the network.

• Separate schedule objects are required for different data types (binary, analog and multistate).

BACnet scheduler objects: object structure

� ScheduleHeader

Weekly schedule

• Calendar object

Header

Exception periods

Present value (ON/OFF)Present value


Weekly schedule

(list of day, time and value)

Exceptions with/without

calendar object references

(list of time and value)

Commanded objects

Priority

Exception periods

(period information)

Basics of BACnet alarming

� Alarms inform the operator about abnormal states in the monitored plant or in the management system

• Alarms can be acknowledged and reset by the operator


Date: 2.9.94Time: 14:45



21.0 C

2 2 . 4 C2 3 2 P

0 % 7 5 %

Of f

O n

Ou ts ite : 2 9. 5 C

7 5 %

2 2 .4 C

On

MS60 - Shell

Acknowledge

Alarm,event

Alarm, event


Date: 2.9.94Time: 14:45



2 1 .0 C

2 2 . 4 C2 3 2 P

0 % 7 5 %

Of f

O n

Ou ts ite : 2 9. 5 C

7 5 %

2 2 .4 C

On

MS60 - Shell


• The BACnet alarm and event concepts support these requirements

• There are differences between events and alarms

GetAlarmSummary: active alarms only

GetEnrollmentSummary: all events and alarms

• Two actions - Intrinsic Reporting* and Algorithmic Reporting

* Intrinsic Reporting is used in Europe* Intrinsic Reporting is used in Europe* Intrinsic Reporting is used in Europe* Intrinsic Reporting is used in Europe

Acknowledge

� Alarmable objects:

� Input, output and value objects, loop and trend support intrinsic reporting

� Alarm conditions (e.g. upper/lower limit of the present value)

� Alarm distribution via assigned NotificationClass object

BACnet alarming:Intrinsic reporting - alarm monitoring in the object


Analog valueobject

Notification classobject

BACnet alarmingAlarm distribution example

BACnet

Routing

Queue Queue

Routing Acknowledge

Alarm, system event

Notification classPriorityAlarm function

Notification class


NotificationClass Class# 5 Priority Alarm function Destination list


Alarm System events

PD

Alarm System events

Common alarm

Reset


Source Class#6 Alarm_State Reset




Alarm System events

PD

Alarm System events

Common alarm

Reset




Source Device Object Class#1

Alarm System events

Source Device Object Class#1

Alarm System events

Destination listProcess recipientsCategory




BACnet Objekt

SequenzRegler

AnalogInput

BinaryOutput

AnalogInput

Device

T

Schedule


commands, exchange data

Busses andnetworks

transport the data


BACnet Protocol Layer Model

Application Layer

Network Layer

BVLL (option)

UDP/IP (option) PTPMS/TP

BACnet Layers

Application Layer

Network Layer

Data Link Layer

ISO/OSI Layers


UDP/IP (option)

ISO8802-2 Type 1

(IEEE802.2)

Ethernet

ISO8802-3

(IEEE802.3)

ARCNET EIA-485 EIA-232

LonTalk

PTPMS/TPData Link Layer

Physical Layer

US specific - not supported

by DESIGO

Simplified Message Frame

Appl.Data

NWData

e.g. NW#

EthernetAddress

EthernetMessage Frame

Appl.Data

NWData

e.g. NW#BVLL

IPAddress

e.g.143.99.51.130

UDPPort

0xBAC0

EthernetAddress

Ethernet/IPMessage Frame

APDU

NPDUBACnet MAC Address

BACnet Application Layer

BACnet Network Layer

BVLLUDP

IPEthernet

Ethernet LonTalk

Msg Code

LSAP0x82

LSAP


Appl.Data

NWData

e.g. NW#

LonTalkMsg. Code

0x4E

LonTalkAddress

Subnet/Node

LonTalkMessage Frame

Ethernet

BACnet Address

BACnet MAC Address Network Number

BA

Cne

t with

Lon

Tal

k

BA

Cne

t with

Eth

erne

t

BA

Cne

t with

Eth

erne

t/IP

NPDU: Network Protocol Data UnitAPDU: Application Protocol Data UnitBVLL: BACnet Virtual Link LayerLSAP: Link Service Access Point

TCP/IP-NetworkTechnology

Example:BACnet onTCP/IP� Each BACnet device is a

TCP/IP node

� Networks use a standard IP Router


Router

� BBMD is required for the distribution of broadcast messages

BBMD – BACnet Broadcast Management Device

Message Path Multiple IP Segments

ApplicationLayer

Network

Application

NL

PXM20_1

BACnetRouter1

NL

BACnetRouter2

IP Router

IP broadcastboundary


NetworkLayer

LON

NL

LON IP

LON

LON

Ethernet/IP

NL

IP LONIP IP

IP RouterBBMD BBMD

LonTalk Segment 1

BACnet Network #1

IP Segment 1

BACnet Network #100

IP Segment 2

Introduction to LON and BACnetIntroduction to LON and BACnetIntroduction to LON and BACnetIntroduction to LON and BACnet

Interoperability

INTEROPERABILITYINTEROPERABILITYINTEROPERABILITYINTEROPERABILITY Capability of compatible devices to implement

EXCHANGEABILITYEXCHANGEABILITYEXCHANGEABILITYEXCHANGEABILITY Possibility of exchanging devices within a

system without changing the functionality

and behaviour of the system

Interoperability – Openness in Three Steps


INTEROPERABILITYINTEROPERABILITYINTEROPERABILITYINTEROPERABILITY Capability of compatible devices to implement

functions and applications within an overall

system and to ensure them

COMPATABILITYCOMPATABILITYCOMPATABILITYCOMPATABILITY Possibility of allowing devices to physically

communicate with each other based on a

standard

Open

ness

BACnet ConceptsBACnet ConceptsBACnet ConceptsBACnet Concepts

Protocol Implementation

Conformance Statement:


� Manufacturer and device information� Physical media and lower protocol layers� Application services and their role (Initiate oder Execute)� Application Objects (Input, Output, Schedule ….)� Character sets supported

BACnet ConceptsBACnet ConceptsBACnet ConceptsBACnet Concepts

BACnetInteroperability

BuildingBlocks:

� Data sharing� Alarm and Event Management


� Alarm and Event Management� Scheduling� Trending� Device and Network Management

Definitions of functions which are important in a (Building Automation und Control System) BACS to be able to operate and monitor the special objects

Data Sharing (DS)

BIBBs: Interoperability Area Data Sharing – some examples

How do we use data in BACS?


DS Client BIBBs�DS-RP-A�DS-RPM-A�DS-WP-A�DS-WPM-A

DS Server BIBBs�DS-RP-B�DS-RPM-B�DS-WP-B�DS-WPM-B

client server

Request

Answer

Data Sharing (DS)

BIBBs – More Details

A.1.12 BIBB - Data Sharing-COV-B (DS-COV-B)The A device is a user of data from device B


A.1.3 BIBB - Data Sharing-ReadPropertyMultiple-A (DS- RPM-A)The A device is a user of data from device B and requests multiple values at one time

BACnet BACnet Interoperability: Device Profiles

Device Profiles - a classification of BACnet devices

B-OWS (Operator Workstation)B-BC (Building Controller)B-AAC (Advanced Application Controller)B-ASC (Application-Specific Controller)B-SA (Smart Actuator )B-SS (Smart Sensor)


B-SS (Smart Sensor)

Each Device Profile has a minimum of BIBBs expected of it

For an accurate assessment of inteoperability then the PICS and BIBBS should be used together

B-OWS B-BC B-AAC B-ASC B-SA B-SSData Sharing DS-RP-A,B DS-RP-A,B DS-RP-B DS-RP-B DS-RP-B DS-RP-B

DS-RPM-A DS-RPM-A,B DS-RPM-B DS-WP-B DS-WP-BDS-WP-A DS-WP-A,B DS-WP-B

DS-WPM-A DS-WPM-B DS-WPM-BDS-COVU-A,B

B-OWS B-BC B-AAC B-ASC B-SA B-SSAlarm & Event AE-N-A AE-N-B AE-N-B

BACnet BACnet BACnet BACnet

Device ProfilesDevice ProfilesDevice ProfilesDevice Profiles


BIBBs, grouped according to interoperability areas

Supported Services in the Advanced Application Controller

Alarm & Event AE-N-A AE-N-B AE-N-BMgmt AE-ACK-A AE-ACK-B AE-ACK-B

AE-INFO-A AE-INFO-B AE-INFO-BAE-ESUM-A AE-ESUM-B

Conformance Testing

� Manufacturer must supply a PICS with a device

� PICS contains a list of standard objects and services used by the device

� Device must be then tested for conformance to verify the correct implementation of these standard objects and services


implementation of these standard objects and services

� Testing is now underway in Europe

Who else has the BTL logo … ?

�MBS GmbHUniversal-Gateways

�Honeywell GmbHDDC Automationsstation XL 1000A1000

�Kieback & Peter GmbH & Co KGDDC 3500

�Neuberger Gebäudeautomation GmbH & CoModulmatic PMC, CM1410


Modulmatic PMC, CM1410

�Sauter AGDDC EYK220 & EYK300

�Messner InvensisAutomationsstation AS29/B

�tac Tour Andover ControlsbCX1 Router / Controller

Main idea ………...

….. to bridge the gap between...

Manufacturers


Manufacturers

Specifiers

Introduction to LON and BACnetIntroduction to LON and BACnetIntroduction to LON and BACnetIntroduction to LON and BACnet

Topologies

BACnet

� BACnet provides for flexible adaptation to the transmission paths in the building.� LonTalk

� TP twisted pair, e.g. FTT 78kBd� PL power line� RF radio frequency Only TP is


RF radio frequency� IR infrared� CX coax (coaxial cable)� FO fiber optics

� PTP (point-to-point), RS 232� Half routers in the terminal units, transmission via analog telephone

(PSTN), ISDN, fixed line (short-distance modem etc.)

� Ethernet and IP networks� Use of the existing cabling in the buildingI

Only TP isrecommended forBACnet because ofmessage length

BACnet

� Ethernet and IP networks� Use of the existing cabling in the building� Fastest technology� (Some vendors already offer high-end controllers with this connection)


AdvantagesInternational standardVarious media (UTP, coax, FO)Protocol implemented in chipNo further development tools

DisadvantagesRelatively high costsNot adapted to any particular systemWill not work with IP V6

BACnet

�LonTalkimplemented on a special chip offering great flexibility with regard to transport media


� TP twisted pair, e.g. FTT 78kBd� PL power line� CX coax (coaxial cable)� FO fiber optics� RF radio frequency� IR infrared

Only TP isrecommended forBACnet because ofmessage length

BACnet

�LonTalkimplemented on a special chip offering great flexibility with regard to transport media


AdvantagesVarious media (TP, ...)Scalable from 32k – 1.25 Mbps

DisadvantagesHigh costs due to development toolLimited distancesNot adapted to any particular systemLimited application size

� LonTalk protocol layers 2...6 in the NEURON ® chip

� Different physical media (Siemens uses FTT10 with 78KBaud)

� Unacknowledged LonTalk ® services only

� Device address consists of

� BACnet network number

� LonTalk subnet/node identifier

®

T

BACnet


� LonTalk subnet/node identifier

� Simultaneous operation ofBACnet and LonMark ® devices on aLonTalk ® segment is not advisable

TT

T

T

Possibilities with BACnet

� PTP (point-to-point) RS 232� Half routers in the terminal units,

transmission via analog telephone (PSTN), ISDN, fixed line(short-distance modem etc.)


FunctioningModems at both ends of the PTP connection act as half routers.When the connection is established, they operate as a router andsend/receive data within the internetwork.

TopologiesBACnet network

BACnetNetwork 4


Date: 2 .9.94Time: 14 :45



21.0 C

2 2 . 4 C2 3 2 P

0 % 7 5 %

Off

On

Out sit e : 29 .5 C

7 5 %

2 2 .4 C

On

MS60 - Shell

BACnetNetwork 1

Standard


Date: 2.9.94Time: 14:45



21.0 C

2 2 . 4 C2 3 2 P

0 % 7 5 %

Off

O n

Out sit e : 29 .5 C

7 5 %

2 2 . 4 C

On

MS60 - Shell


Date: 2.9.94Time: 14:45



2 1 .0 C

2 2 . 4 C2 3 2 P

0 % 7 5 %

Off

O n

Out sit e : 29 .5 C

7 5 %

2 2 . 4 C

On

MS60 - Shell BACnetPTP

BACnet Internetwork


Network 4

IP- Internetwork

LON Subnet LON Subnet

LON Subnet LON SubnetBACnetNetwork 2

BACnetNetwork 3

BACnet-LON / IP-Router

BACnet-LON / IP-Router

LON-Router LON-Router

StandardIP Router

LON Subnet

DESIGO RMSLonMarkObjectEnvironment

Corso “DOMOTICA ED EDIFICI INTELLIGENTI” – UNIVERSI TA’ DI URBINODocente: Ing. Luca RomanelliSocietà : Building Automation srlMail: [email protected]


Protocolli

BACnet - fine

Protocolli per la domotica BACnet - uniurb.it · Domotica ed edifici intelligenti – Università...

Documents

Transcript of Protocolli per la domotica BACnet - uniurb.it · Domotica ed edifici intelligenti – Università...