Diesign And Rearch On Distributed Measure And Control System Based On CAN Filed-bus

This paper proposals the research of distributed measure and control node based CAN field bus in industrial control architecture. Fieldbus is the one of the hotspots in the field of automatization today. It is a kind of network that is applied to industrial field and used to realize serial ,bilateral and multi-node communication between intelligential measure&control equipments. It has the characteristics of open, digital and multi-node communication. Nowadays, it is widely used in manufacturing, traffic, and intelligential building. Its advantage is the characteristic of open and interchange, simple frame, saving material and cost, decrease of maintenance.On the base of analysis and comparison with the influential fieldbus.A kind of fieldbus-CAN bus which suits the application of practical project is chosen, then brief introduction of its characteristics is given. About the intelligential measure&control node, this paper discusses the composing its function modules, the work principle, the hardware frame, software design and the method of realization of each module. Besides the normal node design-CPU plus CAN controller.mode, this paper also gives a new design that can realize all node function without CPU, and after brief introduction and analysis a CAN high layer protocol, the paper design a kind of high layer protocol on the grounds of practical application, In addition,in the design of a communication module, CAN bus and RS-485 bus communition are all realized, thus the system has the function of communication with several kinds of buses.This paper introduces an application of the distributed measure and control network in the battery charge and discharge system.The result of this research also can be applied in different industrial control systems.