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Abstract: In order to increase the efficiency and transparency of manufacturing system, its control model with the function of feedback and the principle of information acquisition for NC machine is discussed. It achieves locale information acquisition for serial devices by the network of combining bus-organized structure Ethernet with serial communication in workshop and
presents a method of developing DNC interface based on PLC. This method
implements information acquisition by getting state from I/O port of PLC
and convert these information into format which is prone to be
recognized by manager and data-base system. On the basis of above
research, the system of locale information acquisition for workshop applies B/S architecture and designs common database based on network, so manager of any department can share the information by data view, and then the vivid information acquisition and manage-ment is achieved. The effectivity and practicability are verified by test run.
Key words: Manufacturing system
Information acquisition
DNC interface
Serial port communication
CLC No: TK421.6
云南省省校合作基金资助项目(2003HBBAA02A049). Received 20051027, received in revised form 20051220
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