Research Of The New Intelligent Node Based On CAN Bus

With the constant development of the economy of our country, the demand of electric energy is increasing constantly. Accordingly, the quantity of transformer substation, the voltage grade and the range of power are increasing rapidly. Therefore, it's more and more difficult to meet the need of security and economy of transform substation that adopts traditional principal and subordinate way to carry on point-to-point communication.Put forward to the developing direction of the transformer substation and combine practicability and economy, this thesis designed a new RTU-intelligent node based on CAN bus. This intelligent node can not only gather and memorize the real-time data , but also transform the data to the control computer by the CAN bus suitable card. In this system, the microprocessor ADμC812 is used as the control core because that ADμC812 is a high speed data gather and process chip. In this system, SJA1000CAN controller is connected to CAN bus to make the system have the function of two-way communication and Flash ROM AT45DB321 made by The Motorola Company is used to memorize the parameter.