梯形图与指令表互译算法的设计与实现-《计算机技术与发展》

文章信息/Info

Title:: Translation Algorithm Design and Implementation of Ladder Diagram and Instructions Table

Keywords:: ladder diagram; instructions table; translation algorithm; tree structure; traverse scanning; node

摘要:: 梯形图由于其形象直观、简单易用、易于掌握等特点，成为可编程控制器的主要编程语言，但其不能被可编程控制器识别，也不能在可编程控制器内部直接运行。此时就需要将梯形图转化为可编程控制器能够识别的语言。而指令表是一种类似于汇编语言的文本语言，简洁高效、较容易被解释执行，在可编程控制器内部解释执行的即为指令表或者指令表的变体。所以，实现梯形图与指令表的互译就尤为重要。文中利用树型结构这个中间工具，使用遍历扫描的方法，实现了将梯形图转化为指令表的算法设计

Abstract:: Ladder-diagram for its image intuitive, easy-to-use, easy-to-grasp features, becomes PLC＇ s main programming language, but it can＇t be recognition, also cannot be run directly within the programmable logic controller. At this point you need to translate ladder diagram into PLC can identify language. And instruction table is a textual language similar to assembly language, because it is simple and efficient, more easily interpreted, interpreted in the PLC within the general instruction sheet or instruction sheet is a variant. There- fore, to achieve the translation of the ladder and instruction list is especially important. In this paper, the tree structure of this intermediate tool and traverse seanning method used to achieve the ladder into the instruction table algorithm