Abstract: This thesis uses the mode of abstract class in OOP to design the data structure of ladder diagram . Then,based on this, it gives the thought and idea of partition processing . According to the topological connection in ladder diagram, separate the whole ladder diagram into function blocks with relative independence , facilitating the latter DP.

摘要： 以面向对象的抽象类模式设计梯形图的数据结构，并以此为基础，给出分块处理思路与方法，即依据梯形图拓扑关系，细分整图为一些独立功能块，如此，使后续的数据处理得到简化。

关键词: 梯形图, 嵌入式PLC, 数据结构

CLC Number: 

• TM571.61