说明：  PLC直接与现场控制层的检测仪器仪表设备连接，是底层控制网络的组成部分，是工厂自动化系统的基石，因此实现与监控层计算机的通信对系统的优化运行有重要意义。文章基于VB讨论台达DVP PLC与监控计算机的通信问题。
(PLC control layer directly related to the scene detection instrumentation equipment, connectivity, control network is the bottom part is the cornerstone of factory automation systems, so to achieve and monitor computer communications layer of the optimal operation of the system has great significance. VB-based article discussing Delta DVP PLC and monitoring the computer)