A LON-based Control System For Air-conditioning

In this paper, I try to bring the completed and detailed idea of design of the whole air-conditioning Fieldbus control system hardware and software. At first, I give the summarization of the concept, history and background, developed status, characteristic and merit of Fieldbus. Furthermore, several kinds of important Fieldbus are introduced and the perspective of Fieldbus is brought out. In the following parts, this paper expatiates the three major parts of the LonWorks, namely: the hardware structure, the composing of software and the exploiting tools .The hardware system of LonWorks is mainly composed of the node system and the LON network. The software of LonWorks is made up of Lonlalk communication protocol and Neuron C language. LonTalk is used to provide information service and manage the LON network. Neuron C is the developing language of Neuron chip node, LonBuilder developing system is a complete set of tool which is used to develop the control system based on Lon technology. In the fourth and fifth chapter, I expatiate the technics, principle and control task of air-conditioning. Then I give the design of the whole project and expatiate the construct of a base control system and the composing of a large Fieldbus system. The end of this paper dwells on hardware and software design of the air-conditioning system.