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现场总线CAN原理和应用技术

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对于一般控制,设备间连锁可以通过串行网络完成。因此,BOSCH公司开发了CAN总线(Controller Area Network),并已取得国际标准化组织认证(ISO11898),其总线结构可参照I SO/OSI参考模型。同时,国际上一些大的半导体厂商也积极开发出支持CAN总线的专用芯片。通过CAN总线,传感器、控制器和执行器由串行数据线连接起来。它不仅仅是将电缆按树形结构连接起来,其通信协议相当于ISO/OSI参考模型中的数据链路层,网络可根据协议探测和纠正数据传输过程中因电磁干扰而产生的数据错误。CAN网络的配制比较容易,允许任何站之间直接进行通信,而无需将所有数据全部汇总到主计算机后再行处理。

Fieldbus CAN principle and application of technology
First,Overview:
For the general control, equipment chain through serial Network. Therefore, BOSCH company developed the CAN bus (Controller Area Network), and has achieved the International Organization for Standardization Certification (ISO11898), its bus architecture Refer I SO / OSI reference model. At the same time, some major international semiconductor companies also actively support the development of the CAN bus ASIC. Through the CAN bus, sensors, controllers and actuators from the serial data lines to link up. It is not just the cable connecting the tree structure, its communication protocol equivalent to ISO / OSI reference model in the data link layer, the network can be detected and corrected in accordance with the agreement in the course of data transmission because of electromagnetic interference and the data error. CAN network preparation easier, allow any direct communication between stations, all without the need to aggregate all the data after the trip to the main computer processing.

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