Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (27): 72-74.DOI: 10.3778/j.issn.1002-8331.2009.27.023
• 研发、设计、测试 • Previous Articles Next Articles
FU Liang，HU Fei-hu，LIU Le，ZHANG Guan-qun
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傅 亮，胡飞虎，刘 乐，张冠群
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Abstract: Usually there are 3 steps in transforming PLC ladder diagram to instruction list：mapping ladder diagram to AOV diagraph，transforming AOV diagraph to binary trees and transforming binary trees into instruction list.The second step is the most critical and complicated.This paper proposes a method that can transform the AOV digraph to binary trees by using series-parallel merging thought，which is visual and easy to realize.An example of transformation is given，which introduces the algorithm and transforming steps.
Key words: Programmable Logic Controller（PLC）, ladder diagram, instruction list
摘要： PLC梯形图转换为指令表通常分为三个阶段，即梯形图映射为AOV图、AOV图转换为二叉树、二叉树转换为指令表。其中AOV图转换为二叉树最为关键也最复杂，提出了一种利用串并联归并的思想将AOV图转换为二叉树的方法，直观易懂并容易实现。给出了一个转换实例，并介绍了算法思想及其实现步骤。
关键词: 可编程控制器（PLC）, 梯形图, 指令表
CLC Number:
TP301.6
FU Liang，HU Fei-hu，LIU Le，ZHANG Guan-qun. Algorithm about transforming PLC ladder diagram to instruction list based on series-parallel merging method[J]. Computer Engineering and Applications, 2009, 45(27): 72-74.
傅 亮，胡飞虎，刘 乐，张冠群. 基于串并联归并的PLC梯形图向指令表转换算法[J]. 计算机工程与应用, 2009, 45(27): 72-74.
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URL: http://cea.ceaj.org/EN/10.3778/j.issn.1002-8331.2009.27.023
http://cea.ceaj.org/EN/Y2009/V45/I27/72
