5Clifford J.,Peshek,Jeffery Graham.Recent Developments and Future Trends in PLC Programming Languages and Programming Tools for Real-Time Control[C].IEEE Conference Record of 1 993 Forty-Fifth Annual Conference of Electrical Engineering Problems in the Rubber and Plastics Industry,1993:102-1 13.
8Ken Ball. PLC I/O Systems: News, Views, and Networks [J]. CONTROL ENGINEERING, 1997,44(14):81～88
9P. Roengruen, T. Suesut, V. Tipsuwanporn, etc. Design of PLC Networks Using Remote I/O Module Based on Controller Area Network [C]. Electrical and Computer Engineering, Canadian Conference on, 2001, 2, 1023～1027
10Chiueh TC. RETHER: A software-only real-time Ethernet for PLC networks [C]. USENIX ASSOCIATION PROCEEDINGS OF THE WORKSHOP ON EMBEDDED SYSTEMS, March, 1999. 45～53
