【摘要】 本文首先对MAP3.0应用层的MMS协议作了基本介绍,侧重于VMD模型的描述。在简单介绍可编程序控制器(PC)后,对PC入网策略作了研究,以较大篇幅叙述了PC/PC功能到VMD模型的映射,并给出以这种策略为指导的实现例子。最后对PC入网作了总结和展望。更多还原

【Abstract】 First,this paper presents a brief introduction of the MMS protocol,especially the description of the VMD model,in the application layer of MAP 3.0.Then the strategy of PC’s connecting to network is studied,We concentrate on the mapping of PC/PC functions to the VMD model,and give an instance of prototype implementation guided by this strategy.At last,we make a summary and prospect.更多还原