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Test and analysis of data traffic in OPC communications

The amount of data during OPC Client and OPC Server communications is an important parameter to design an equipment, a network and a system, but it has never been given in the theoretical calculations or tests. In this paper amount of data is tested, and the result of the test is analyzed by designing and making six groups of experiments, then recording, analyzing and operating the data. In the end, empirical formula is obtained for the first time in the OPC Client and OPC Server Communications. The empirical formula shows that relationship between the amount of data per second and the number of the data item is almost linear, and relationship between rate and the number of the data item is similar to the above-mentioned relations. Based on above-mentioned conclusions, the test will explain how much data every OPC Client or OPC Server can load.