一种基于PC BUS的DCS网卡的令牌管理机制

The Token Mechanism of a Kind of DCS Network Card Based on PC BUS

本文对一种DCS工业控制通信网卡XJTUTBLC97的硬件原理进行了介绍，对其中使用的分牌管理机制进行了论述，对令牌争用技术、逻辑环形成和重组技术进行了详细讨论。

The paper describes the hardware principle and the token mechanism of a kind of DCS network card XJTU TBLC97. The token competition technology,logic loop initiation and recomposing are discussed.