LD 로직 편집기의 GUI 구현에 관한 연구

LD(Ladder Diagram) is one of PLC programming language provided in IEC 61131-3 standard, is used most widely. PLC is logic language to operate only in private hardware. Nowadays with the development of hardware, many study is being carried about to operate SoftPLC type to be included in PLC for samely functions. In this study, we are discussing about GUI implementation of LD logic editor for development tool for SoftPLC using LD. We define a new language is called LDI(Ladder Diagram Instruction) to save LD to a file.