This paper expounded that the long distance operating station connect to PLC control system with ASCII module, and edited the communication program stored in ASCII module.
本文阐述了可编程控制器控制系统中，通过ASCII模块，实现远程操作站与可编程控制器的连接，并开发了ASCII模块中的接口通讯程序。
The operating rate of extrusion machine in China is only 35% or so, which falls long distance behind of the developed countries' level, and is less 30% than the world average operating rate.
而中国挤压机的开工率仅为35%左右，远远落后于发达国家水平，比世界平均利用率低30个百分点。
The reader controlled by the single chip of 89C51 is able to identify automatically the number and style of the vehicles and charge with the long-distance electric tags by programmed operating orders.
由以89C51单片机为核心控制器的读写控制装置，实施指令操作，采取射频自动识别车号、车型，远距离电子标签卡收费。
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