Organization of secure communication between programmable logic controllers using the open platform communications protocol

Abstract

Modern automated control systems in industrial and private enterprises are represented by a set of programmable logic devices and components from various manufacturers. They operate based on many of the most widely used protocols and interfaces. Some manufacturers have their own solutions that are mainly focused only on their product, without direct or indirect compatibility with third-party solutions. Many control systems used now operate on relatively old solutions that cannot be partially modernized due to lack of technical resources or financial unprofitability. The paper considers the most popular industrial protocols Modbus and Profibus, analyzes their advantages, as well as features of the structure and functionality. The study of the operation problems and information security of modern control systems is considered, solutions for their elimination are analyzed. A solution for the control systems modernization was proposed based on the analysis. It can become effective and financially justified due to its technical features, allowing it to be adapted to existing solutions. Conclusions about the effectiveness of the proposed solution were formulated based on the data collected and the goals achieved.