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:  2025
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(.):  delay, availability, model, design, human-machine interface, network calculus, regulator with feedback
:   , - () . () SCADA . , , , , . (), , , . . (-) , . : , . . .
(.):  In this work, the problem of synthesizing the structure of a distributed program implementing the human-machine interface (HMI) of the automated process control system for assessing its time characteristics and determine the limitations on input flows when justifying the performance of system elements. Task The problem is based on the upper level control system (ULCS) of the NPP based on the SCADA "Operator" developed by the Institute of Control Systems of the Russian Academy of Sciences. Usually, the task of synthesis arises at the initial stage of the system's life, when the main requirements, including time characteristics, are minimized, but the structure of the software package is not yet fully formed, and many of its elements are at the development stage. Modeling the used tool for acceptability of configuration data and choosing the most suitable basis for further testing on benches. As an instrumental modeling, the equipment of the of Network Calculus (NC) is used, which provides deterministic and observational estimates of the time parameters of the display system which is especially important for the ULCS of the NPP, since this system is related to safety systems. In the modeling, an assumption was made that when data is jointly processed by competing programs, they do not bring mutual benefit to society. For modern HMI for process control systems, such simplification is justified by using multi-core architectural computers, where each program can be allocated as its own core. Based on the modeling results, a hybrid (parallel-serial) structure of the software complex was selected, implementing the HMI of the NPP ULCS. In the process of developing the model, new results were obtained: two connections describing the parallel and serial connection of regulators with a static window in the feedback circuit within the NC. An equation was also derived for maintaining curves with two types of flow increase to the output regulator.

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