MATHEMATICAL MODEL OF DEPENDENCE OF DATA TRANMISSION SPEED ON THE LENGTH OF THE SPECSALIZED COMPUTER NETWORK SS-LINK SEGMENT

Abstract

Currently, between producers in various fields is constantly fighting for markets. The main factors that allow us to win this fight are to ensure the production of quality products at a lower cost than the competitor. The tool that will achieve the above advantages is the introduction of modern technologies in process control systems. One of the current and promising areas of modernization and creation of new automation systems by technological processes is the construction of such systems on the basis of specialized computer networks. CC-Link, a specialized computer network, was developed by Mitsubishi Electric Corporation in 1996. And since then it is constantly improving and evolving. CC-Link network has been certified in accordance with international standards IEC61158 / IEC61784, ISO15745-5, SEMI E54.12, state standards of China and South Korea. The CC-Link partner association includes 3,793 companies worldwide, and the board of directors of this association includes the world-famous companies Mitsubishi Electric Corporation, Cisco Systems Inc, 3M Company, NEC Corporation, Schneider Electric Japan Holdings Ltd. The technical advantages in favor of the use of a specialized computer network CC-LINK in process control automation systems include the fact that it is a high-speed (up to 10 Mbps at a distance of up to 100 m), open and deterministic industrial network, which has the means to increase network reliability. As a result of the conducted researches the mathematical model of change of speed of data transfer from length of a segment of the specialized computer network CC-Link is developed. The error in calculating the value of the data rate in the CC-Link network using the developed model does not exceed 0.04%. The developed mathematical model can be further used in the design of new systems based on the CC-Link network.