| In modern enterprises, it is imperious to realize information seamless integration from control layer to managing layer. This paper researches on Gateway between LonWorks fieldbus and other communication bus. The purpose is to combine LonWorks technology with the whole control system, and effectively resolve the real-time share problem of data in the networked control system.After analyzing current control system's defects and new demands, the paper puts forward a general structure of the networked control system based on the Gateway connecting between fieldbus and Ethernet, USB, RS232/485, and mainly researches on the connections between LonWorks and Ethernet, USB, RS232/485. Connective methods between LonWorks and Ethernet are studied. A hardware design of LonWorks-USB Gateway is given. Then the paper accomplishes the design of LonWorks-RS232/485 Gateway prototype, including hardware design, software design and debuggmg.Finally, by studying on Train Communication Network, LonWorks-RS232/485 Gateway prototype is applied to the intelligent control, remote monitoring & diagnosis system of rail transit auto-door, and gets good effects in experiments. |
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