| Title |
Study on the Composition of Subsystem Designed by Hierarchical Control Structure of SFC |
| Keywords |
PLC ; Ladder diagram ; SFC ; Hierarchical Control Structure ; Composition |
| Abstract |
In industrial control system used by Programmable Logic Controller(PLC), Ladder Diagram(LD) is the most widely utilized and plays an important role in industrial control system. But recently, the study about Sequential Function Chart(SFC) is performed actively. When we program by SFC, generally, we design one routine from start to end. This metnod is difficult to design, and we often make mistakes. In this paper, we propose the method that we compose each sub-system after we design each sub-system, and confirm his feasibility through an actual examples. |