Research Of Remote Administration Of Power Based On CAN Bus

In the field of industrial control, the fieldbus, which is based on the techniques in microelectronics and network, is now undergoing a fast development and wide application. On the basis of the system of transmitting remote meter data, the study is mainly concerned with the design of a measurement & control node in CAN (Controller Area Network) and a CAN network control system.The advantage and the disadvantage of FCS are analyzed. Comparison is made on the present fieldbus systems. Then, considering the object, the CAN bus is selected to complete the control system together with RS485 and RS232. Because CAN bus is more suitable to mid and small sized control systems.The duty of the study is to design the CAN/RS485 controller, the CAN/RS232 controller and the visual monitoring software. The hardware and software design of the interface to CAN bus is the focus of the study. On the basis of a comprehensively study on the principles of CAN bus, interfaces of CAN/RS232 and CAN/RS485, is realized with SJA1000 Stand-alone CAN Controller, as well as the corresponding network communication software. And the corresponding visual monitoring software is designed with Visual C++, realizing part of primary function of FCS.Taking account of heavy disturbing environment factor, many methods are adopted in controllers, for example, optoelectronic isolated circuit, removing coupling circuit, watchdog circuit, backup power, and so on. The simulated serial bus of I C is used in the control system, in order to optimize the design of single-chip microcomputer system and achieve connection between single-chip microcomputer and external apparatus using lesser line.An experimental FCS based on CAN bus is realized. In total, this system features high reliability, feasibility, simplicity, high performance/price ratio, and so on. But, in order to coming into being series of CAN products, there is much particular work to be done.