BACnet in China – Efficient system integration of building automation and control technology October 20th 2009 2009 10 20 H. Michael Newman Cornell Univerity.

BACnet in China – Efficient system integration of building automation and

control technology

October 20th 20092009 年 10 月 20 日

推进楼宇自控和系统集成的新发展

H. Michael Newman

Cornell Univerity

BACnet in a Nutshell –

The Success Story of the

BACnet Protocol

BACnet 北京论坛

2009

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Before BACnet...

October 20th 2009 / 2009 年 10 月 20 日 3

After BACnet...

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Reasons for BACnet's success:

• BACnet is the only standard protocol designed specifically for building control. It was designed from the beginning to support:

– Alarm and event processing– Command prioritization– Scheduling– Trending

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Reasons for BACnet's success:

• BACnet doesn't depend on current technology

– BACnet is implemented through software, not hardware

– BACnet's objects and services are independent of the underlying network technology

– BACnet/WebServices allow communication between BACS and enterprise applications (for example: room scheduling, energy monitoring)

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Reasons for BACnet's success:

BACnet LAN - Ethernet, ARCNET, MS/TP, LonTalk, or BACnet/IP

Sensors and Actuators

BACnet Field Panels

BACnet Workstation

Vendor AVendor A

Vendor BVendor C

• BACnet has no fixed architecture. Can be flat:

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Reasons for BACnet's success:

• Or BACnet networks can be hierarchical:BACnet LAN - Ethernet

BACnet Field Panel

BACnet Workstation

Vendor A

Sensors and Actuators

Vendor CVendor C

BACnet LAN - ARCNET

Sensors and Actuators

Ethernet to ARCNET

Router

Vendor BVendor BBACnet

Field Panels

BACnet Field

Panels

Ethernet to MS/TP Router

BACnet LAN - MS/TP

Sensors and Actuators

Net 1

Net 3Net 2

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Reasons for BACnet's success:

• Can be implemented in devices of any size

– Application specific controllers– Configurable, fixed-program controllers– General purpose, programmable controllers– Workstations and Web servers

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Reasons for BACnet's success:

• Most BACnet devices are actually small...

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Reasons for BACnet's success:• BACnet can be easily enhanced to embrace building technologies beyond HVAC&R:

– Access control– Elevators– Lighting control– Utility integration– Video surveillance

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Reasons for BACnet's success:

• No charge for BACnet's use - no fees, licenses, or royalties. BACnet is an ISO standard.

¥ € $

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The Biggest Reason for BACnet's success?

People from all over the world

Communication specialistsBuilding automation engineersBuilding ownersGovernment officialsManufacturersBuilding operatorsSoftware engineers and programmers

working together!

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谢谢！

BACnet and China

The BACnet community looks forward to working with our colleagues from BIG-CN, SAC/TC426 and elsewhere to make BACnet a success in China and worldwide!