Technical data

Glossary • 331

WAGO-I/O-SYSTEM 750

BACnet/IP Controller

Glossary

ASHRAE (American Society of Heating, Refrigerating and Air-

Conditioning Engineers)

ASHRAE is an American professional association for HVAC engineering

that was founded in 1894.

ASHRAE prepares and publishes manuals, magazines, standards and guide-

lines for the air-conditioning sector.

The BACnet protocol has been the standard for ASHRAE since 1995 and

was accepted by ANSI in 2004 (ANSI/ASHRAE 135-2004).

BACnet (Building Automation and Control Networks)

BACnet denotes a fieldbus, a protocol, a standard or a process that can be

used to compatibly exchange data between devices of various manufactur-

ers. BACnet was developed in 1987 by ASHRAE for building automation

services and has become anchored in different standards since then

(ASHRAE/ANSI standard (135-2004), DIN EN ISO standard (16484-5)).

BACnet is primarily oriented toward the HVAC sector.

BACnet standard objects and properties, which can be accessed by likewise

standardized services, are defined in the standard to achieve the required in-

teroperability.

Manufacturers publish in a document (PICS) those BACnet standard objects,

properties and services that they support. This information is provided in

blocks broken down into the various functions (BIBBs). Devices are classi-

fied in five device profiles to permit easier comparison of the BACnet de-

vices with regard to their various functions and the different possible combi-

nations of objects and services. Each device profile specifies defined mini-

mum requirements for the BACnet functionality that is implemented, facili-

tating the selection of a suitable device by the customer for specific applica-

tions.

BACnet is suitable for the field level as well as the automation level.