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现场总线fieldBUS是工厂的最底层通信网络，近年来发展很快，将对自动控制系统的结构产生较大影响。本文简要介绍LON、CAN、BITBUS、I2C、SPI／SCI等几种常见的现场总线。
Fieldbus fieldbus is the lowest communication network in the factory and has developed rapidly in recent years and will have a great impact on the structure of the automatic control system. This article briefly introduces LON, CAN, BITBUS, I2C, SPI / SCI several common field bus.