Real-time Data Access In The Distributed Environment By OPC

With the development of computer and network technology, there is a great change in the field of automatization; the data traffic in the distributed environment has been a hotspot. However, the industry automation system is a close system at present, which the unified and normal open interface about software and hardware is absent. This paper analyzes the background of a operating standard of the software for industry control of OPC specification, OPC system structure, object and interface technology, as well as it brings great behalf to industry control domain. This paper expatiates also on COM/DCOM principle which is OPC nuclear technology, discusses OPC realizable principle and applied technology in actual application, moreover it realizes OPC Client/Server data traffic method between epigyny computer and local equipment taking Symphony control system as object and using SemAPI software and OPC technical fold which provide by system. Hu Danhua (Control Theory and Control Engineering)Directed by associate prof. Ma Yongguan...