系统软件采用模块化编程，程序用梯形图语言编写。
The system adopts module programming and its program is compiled with ladder diagram language.
而众多的编程语言中，梯形图语言和语句表语言最为受欢迎。
Among those languages, ladder language and sentence table language is the most popular.
文章介绍了梯形图语言与语句表语言之间的互换算法，并以OMRONC系列可编程控制器为例做以说明。
This paper introduces the algorithm of translation between these two languages with the example of OMRONCseries PLC.
论文讨论了PLC的原理及软plc的优越性、软plc编译原理，重点研究了PLC梯形图语言的编译技术。
Paper discussed soft PLC, include its superiority and the principle of PLC compile principle, emphasize studied PLC ladder digram compile technology.
论文讨论了PLC的原理及软plc的优越性、软plc编译原理，重点研究了PLC梯形图语言的编译技术。
Paper discussed soft PLC, include its superiority and the principle of PLC compile principle, emphasize studied PLC ladder digram compile technology.
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