The most application of the communication technology between the two RS-232 serial ports made the upper-PC communicated with the lower-SCM (the control system of the center air conditions as well as C51 Single Chip Micyoco) to each other,.
主要通过运用RS-232串行端口通信技术，使上位机(PC机)与下位机(中央空调的控制系统C51单片机)进行数据通信。
参考来源 - 中央空调网络管理系统·2,447,543篇论文数据，部分数据来源于NoteExpress
We use a Pocket PC as main computer, which is located in the upper part of the robots.
我们使用掌上电脑作为主要的计算机，这是设在上半部分的机器人。
The first part is the software locating on the upper, the PC.
第一部分是上位机——PC机上的系统程序。
The host, upper PC connected with field bus or fiber network simultaneously, is responsible for searching the date of bottom devices.
上位机同时挂接现场总线或光纤网络，搜索底层设备数据。
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