CAJ | 학술논문

提出了一种基于指令向量表的嵌入式软PLC系统的实现方法。系统由开发系统和执行系统构成。开发系统所编辑的梯形图（ LAD）、语句表（ STL）形式的PLC程序将被转换生成为中间代码。执行系统建立一个指令向量表，按指令识别码储存中间代码指令函数的入口地址，使解释型软PLC系统取指后可以对中间代码的指令执行函数进行直接快速跳转，从而提高解释型软PLC的执行效率，保证了解释型软PLC执行系统的实时性，使解释型软PLC执行系统具有接近于编译型软PLC执行系统的执行速度。
제출료일충기우지령향량표적감입식연PLC계통적실현방법。계통유개발계통화집행계통구성。개발계통소편집적제형도（ LAD）、어구표（ STL）형식적PLC정서장피전환생성위중간대마。집행계통건립일개지령향량표，안지령식별마저존중간대마지령함수적입구지지，사해석형연PLC계통취지후가이대중간대마적지령집행함수진행직접쾌속도전，종이제고해석형연PLC적집행효솔，보증료해석형연PLC집행계통적실시성，사해석형연PLC집행계통구유접근우편역형연PLC집행계통적집행속도。
It proposed a more efficient method to implement an explain type soft -PLC system by creating an instruction vector table .This kind of embedded system consists of development subsystem and execution subsystem .The ladder diagram ( LAD) and statement list ( STL) edited by the development subsystem will be converted and generated as intermediate code .The execution subsystem set up an in-struction vector table .That table stores the entry address of instruction functions following the order of their ID.It can make instruction functions jump more directly and more quickly after instruction fetching . These methods will ensure real -time performance and efficiency of the explain type system .The execu-tion speed of such a explain type system is close to that kind of compiled type system .