8Kim H S,Kwon W H,Chang N.A translation method for ladder diagram with application to a manufacturing process[C]//Proceedings of the IEEE International Conference on Robotics and Automation.Detroit,Michigan:Robotics and Automation Society,1999:793-798.
9Chmiel M,Hrynkiewicz E,Muszynski M.The way of ladder diagram analysis for small compact programmable controller[C]//the 6th Russian-Korean International Symposium on Science and Technology.Novosibirsk,Russia:IEEE Electron Devices Society,2002:169-173.
10Suesut T,Inban P,Nilas P,et al.Interpretation petri net model to IEC61131-3:LD for programmable logic controller[C]//Proceedings of the IEEE Conference on Robotics,Automation and Mechatronics.Singapore:IEEE,2004:1107-1111.
