| 摘 要： | This paper deals with the structure and the merit of DeViceNet.It deacribes the process and interface of the network communication in details.DeviceNet is derived from CAN protocol, it saves field wirse by using BUS structure, and reduces the network traffic by using the model of Producer/Consumer.DeviceNet can provide the ability of collecting monitor data and configuration data hrom the devieces without interrupting their communication.Rockwell Automation interproses a DeviceNet Scanner between PLC controller and the network to manage the exchange of data,and also introduces a communication interface to allow lots of devices to connect to DeviceNet.Based on DeviceNet.Rockwell Automation advanced a network system in plant with three layers:DeviceNet,ControlNet and EtherNet.
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