Transformation Algorithm Between Ladder Diagram and Statement List Based on AOV Diagraph and CE Diagraph
Zhicheng Ji · Measurement & Control Technology · 2008
Transformation algorithm between the ladder diagram and the statement list based on the AOV diagraph and the cause and effect diagraph for programmable logic controller(PLC) systems is proposed.The ladder diagram is transformed to the AOV diagraph,then the statement list is created by traversing the node in cause and effect diagraph.On the contrary,the statement list is transformed to cause and effect diagraph,then the ladder diagram is generated based on cause and effect diagraph.Proved by programming,the algorithm is compact,practical,universal,and it is successfully used in the development of a domestic PLC system.