Research And Implementation Of Remote Monitor And Control System Based On OPC

OPC(OLE for Process Control),which is application of Microsoft's OLE(Object Linking and Embedding)technology in process control system, provides a unified standard for the development in industrial automation software. The aim of OPC is to provide a standard mechanism for communicating with numerous data sources. OPC technology makes system integration easier.In this irrigation district pumping station supervision system, transfer protocols are different between equipments. To resolve this problem, this thesis introduces OPC technology into the system, discusses irrigation district pumping station supervision system base on OPC in order to make system integration easier with advanced computer software technology.Firstly, this thesis discusses COM fundamental knowledge, such as COM object, COM interface, COM connectable object and so on. Secondly, this thesis studies OPC technology base on COM. On the basis of discussing OPC fundamental knowledge, this thesis discusses OPC data access methods, which is the base of OPC asynchronous communication, discusses OPC browsing address space methods, which is easier to check items in OPC server. Thirdly, according to the system requirements, designing system particularly and give resolving schemes of system. Finally, on the basis of analyzing data interaction of the system, this paper raises the framework of monitoring system based on OPC, gives implementation of some modules including OPC module and communication module.The system achieves remote monitor and control for pump station and improves the automation level of supervisory.