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软PLC编译系统的开发与实现

Keywords: 可编程逻辑控制器(PLC),编译程序,梯形图,语法,指令表

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Abstract:

为了配合在PC机上运行的软PLC编辑开发系统,使PC机完成相应的控制功能,设计和开发了软PLC编译系统,简述了软PLC编译系统的组成以及软PLC梯形图和指令表的遍历算法,介绍了软PLC梯形图与指令表程序相互转换的实现过程,通过实例,分析了软PLC程序的指令表文法设计过程,给出了PLC文法预测分析器模型及控制程序,详细介绍了软PLC程序语法分析的过程,仿真结果表明,开发的软PLC编译系统能实现软PLC梯形图与指令表程序的相互转换,完成软PLC程序的文法设计和语法分析,并对软PLC程序的运行指令作出正确解释,使PC机完成相应的控制功能。

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