Addendum a to ASHRAE Standard 135.1-2003, Method of Test For Conformance to BACnet, defines new tests for features of BACnet that have been added since publication of the testing standard as well as refinements based on experience testing BACnet products.
Standard 135.1 defines the steps to test whether a product or application conforms to the BACnet standard and correctly provides the features claimed by the supplier.
Addendum b to ANSI/ASHRAE 135-2004, BACnet — A Data Communication Protocol for Building Automation and Control Networks, also completed public review shortly before the meeting. The BACnet committee is studying and responding to the 14 comments received.
The proposed addendum contains new BACnet features related to advanced trend logging capabilities and specialized alarm handling capabilities important in Asian markets.
The BACnet committee also approved the last of its responses to the 53 comments received from the public review of BACnet/WS, the BACnet Web services proposal. BACnet Web services are intended to integrate building automation systems with various enterprise applications.
Representatives from three manufacturers of variable frequency drives (VFDs) joined the Applications Working Group to cooperatively develop a standard BACnet profile for VFDs.
This will be the first application-oriented profile developed by the Working Group and will provide the model for others to come.
The Internet Protocol Working Group, disbanded years ago when "Annex J" BACnet/IP was added to the BACnet standard, has been reformed to address and take advantage of new aspects of Internet communications developed and deployed in the intervening time.
Other topics the BACnet committee is working on include standardized communications between energy utilities and BACnet systems, CCTV and access control data models, BACnet network security, and BACnet support for lighting controls. For more information, go to www.ashrae.org.
