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DeviceNet是美国罗克韦尔公司提出的一种基于CAN技术的通信网络,其协议开放、结构简单、通讯可靠以及成本低廉是设备层现场总线的最佳选择;对DeviceNet基于连接通讯的特点和实现过程进行了论述;开发了基于DeviceNet的智能从节点,主机部分采用P89C61X2单片机,选择SJA1000作为CAN控制器,82C250作为报文收发器,建立了设备通讯测试平台;实践表明,该智能节点能实现DeviceNet规范。
DeviceNet is a communication network based on CAN technology proposed by Rockwell Corporation of the United States. Its protocol is open, simple in structure, reliable in communication and low in cost are the best choice for fieldbus in the device layer. DeviceNet is based on the characteristics and implementation of connection communication Process is discussed; DeviceNet-based intelligent slave node is developed, P89C61X2 single-chip microcomputer is used in the host part, SJA1000 is selected as CAN controller, 82C250 is used as packet transceiver, and a device communication test platform is established. Practice shows that this intelligent node can realize DeviceNet specification.