By use of modular and computer compiling techniqe, the automatic conversion of electric diagram to the logical expression of relay ladder diagram, the automatic plotting of relay ladder diagram, and the automatic programming of PC command are realized.

• 进而使用模块化和计算机编译技术，实现了电气图向梯形图逻辑表达式的自动转换、以及梯形图的自动绘制和PC指令的自动编程