數控網絡系統是數控系統發展的趨勢，在這類系統中，結點之間通信的最大要求是高實時性、高可靠性，最大特點是通信數據量較小，且具有周期性。本論文將根據數控網絡的這些特點，詳細介紹如何在物理層，用VHDL 語言設計一個滿足這些要求的模塊，通過光纖實現點對點的通信。
關鍵詞：光纖通信，數控網絡，CNC, FPGA
Constract: CNC( Computer Numerical Controller) net is the development trend of the CNC
technology .In this kind of system ,the most important requirement of communication between
points is high real-time ,high reliability ,the biggest character is that transmited data amount is
comparatively little and transmission has periodicity .This paper will describe how to realize the fiber communication between points in the CNC net base on the CNC net character .This module is designed with VHDL language and realized with FPGA, all of the function is realized in physical layer .
Keywords: fiber communication , CNC net , CNC ,FP