This paper discusses the characteristics of CAN bus in comparision with RS485bus. The design and realization process of the hard circuit and softw are of the intelligent node of DCS based on CAN BUS are discussed in detail.

• 以RS485总线为比较对象,讨论了CAN总线的特点,较详细地介绍了基于CAN总线分布式控制系统智能节点硬件和软件的设计以及实现过程。