Application Of OPC In The Real-time Supervisal And Control System In Internet

With the rapid development of Contemporary Integrated ManufacturingSystem, manufacture systems become larger and larger, and the functions ofthese systems become more and more complex. Nowadays, there is a generaldemand for the systems to be open, extensible, reusable andcooperative.However, the traditional Information Integration methods canhardly meet this demand. Reusing, re-structuring and sharing enterpriseinformation resources in a distributed object environment have been thetendencyofthefutureenterpriseinformationintegration.The passage researchs that the OPC technology,COM/DCOM technologyandInternettechnology,andcarryonthesystemoftheOPCDataAccessandthe Internet technology.Theremore,the passage introduces the study of theOPC client system and the OPC serve system and the communicationbewteen them.the system accords with the OPC Data Access Specificationand adopts ASP technology to do the distributed compute means, andcombines the merits of the OPC technology and Internet technology. Theresult of experiment indicates that the system can satisfy the damand of thedistributedlongdistancedreal-timesupervisalthecontrolsystem.