说明： 从事Profibus的开发人员可以利用改源代码理解profibus协议。添加除通讯以外的代码，很快可以开发出自己的智能节点 (engaged in the development staff can use the source code to understand change Profibus agreement. Add except communications code, we will soon be able to develop their own intelligent nodes)
文件列表：
USER
....\DPS2SPC3.C ....\INTSPC3.C ....\SPC3DPS2.H ....\USERSPC3.C
