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Title: RS-485/MODBUS based Intelligent Building Automation System using LabVIEW
Authors: Bhatt, Jignesh G.
Verma, H. K.
Keywords: Building Automation System
Intelligent Building
Virtual Instrumentation
Issue Date: 19-Feb-2010
Publisher: IIT Roorkee
Citation: 4th International Conference on Computer Applications in Electrical Engineering - Recent Advances (CERA-09)
Series/Report no.: IN-122
Abstract: Building automation systems (BAS) are transforming from the legacy stand-alone security and safety systems to intelligent computerized network based solutions. This paper presents the design of a three-layer BAS for a residential building. Sensors and MODBUS compliant digital I/O DAQ modules are wired to form an RS-485 network at field level, that are connected to a PC based main controller. The design incorporates central servers for-(i) OLE for Process Control (OPC), (ii) Camera, (iii) Graphical User Interfaces (GUIs) and (iv) Entertainment. A local or remote workstation working as a client can access all functionalities using intranet or internet respectively. RS-485 network is used for the time-critical process-alarm data exchange, and Ethernet backbone is used for high speed Client-Server communication. Various functionalities of the BAS have been validated through laboratory implementation.
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