| This paper addresses the network model configuration of DeviceNet and ControlNet. The network topology, transfer medium and various network connective accessories of DeviceNet physical layer are considered, and the MAC frame, bus arbitration mechanism, application layer message, object model and equipments communication of data link layer are also presented. The contents of communication Cables and their equipments, topology configuration of ControlNet physical layer, the token bus protocol of data link layer and the connection management, data transformation of CIP layer are discussed in detail.After investigating the function requirement of Pneumatic feeding system in the ChengZheng tobacco processing line, the whole plan of controlled system based on CIP network is given. According to the contribution of industrial network, there are two network layers in the Pneumatic feeding system. The first layer is ControlNet network, which carries out the information exchange among PLC, man-machine interface and other Sites. It is mainly focus on the re-location of the repeater, network parameters preferences and the connection configuration of touch screen.The second layer is DeviceNet network, which carries out the connection among bottom layer equipments including inverters and sensors. It is mainly focus on the network connection with main-to-branch topology configuration, the configuration of address and baud rate and the network configuration. This paper designs the PLC control program, and gives the establishing of new project and variables selecting of state monitoring. It also focuses on the control of inverter and the data acquisition between cigarette making combination machine and store cabinet. The program of man-machine interface is introduced, and the key technique of some main objects is also give in detail.The above-mention Pneumatic feeding system has been applied in industrial process with favorable effect, and it is also demonstrate the effective of this paper's work. |
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