OPC Based Information Integrated System For Industrial Control Network Laboratory

With the rapid development of general automation technology, most of industry enterprises require control system not only to achieve control mission, but also to make the realization of communication and management, that is computer integrated process system. And information integration of enterprise is the key to the CIPS, but the protocol of isomeric system is not compatible each other. What is more, the protocol standard between control network and information network is not consistent either. Therefore, it is difficult for different system to achieve direct data exchange in the process of system integration. By constructing the interface specification that accords with the requirement of industry control, the OPC plays a convenient role in the information integration and information share of the enterprises. It is the OPC that makes data access to device or control system efficiently and steadily. And the OPC can also provide an effective support for the integration of the field control level, the process management and the business management level in the enterprises. This paper takes industrial control network laboratory as a case study. According to the structure of general automation that is aimed at the integration of management and control, we describe several information integration schemes in the system of industrial control network laboratory. Then this paper makes a deep study on the application of OPC in information integration of the network laboratory. The main contents are as follows: The horizontal integration of network laboratory is discussed. According to the client/server model of OPC, the OPC client is designed to connect the OPC Server and access the real-time data of system. The openness problem of control system such as PLC, DCS is solved and the interconnection, the intercommunication and the interoperation of all kinds of isomeric system are achieved in this way. The vertical integration of network laboratory is discussed. The information integration between control system and information system is achieved by the OPC and ActiveX data objects. The software structure of network laboratory is discussed. Information integration system adopts double C/S structure and consists of data access, server and client. Then, specific function and implementation of three layers of network laboratory are described in detail. The test on the layer of data access and client is operated, which proves that the network laboratory system has a high performance in its information integration. The research and implementation on the information integration system can meet the demand of management and supervisory of network laboratory, and improve the experiment effect for teaching. The information integration technologies that are involved in the system of industrial control network laboratory have great engineering application worthiness while the enterprises need to solve the problems of information integration in the process of CIPS.