What is BACnet?

BACnet is “a data communication protocol for building automation and control networks.” A data communication protocol is a set of rules governing the exchange of data over a computer network. The rules take the form of a written specification that spells out what is required to conform to the protocol.

Here is a link to BACnet: Answers to Frequently Asked Questions, last updated October, 1998. This is a well established, robust controls technology.

In this article, H. Michael Newman, Manager of Cornell University’s Utilities Department Computer Section and Chairman of ASHRAE’s BACnet committee since its inception in 1987, answers some of the most frequently asked questions about the BACnet standard, ANSI/ASHRAE 135-1995.