Вдосконалення підходу до гнучного рецептурного керування станції мийки на місці

A clean-in-place (CIP) station has been investigated in this study. The task addressed relates to the lack of flexible methods for controlling formulations for a CIP station. In most industrial systems, the cleaning algorithms are rigidly embedded in the control program, which complicates modification of technological procedures without intervention in the program code. This paper reports the development of a formalized approach to controlling the formulation for a CIP station based on the IEC 61512 standard principles, which ensures the separation of technological procedure descriptions from the implementation of equipment control functions. The study includes an analysis of requirements within the IEC 61512 standard for formulation description, as well as the construction of a formalized model of procedures. An approach has been proposed to represent cleaning formulations as a structured list of technological operations with process parameters, which makes it possible to formalize the sequence of cleaning stages. It has been shown that such a technique of formulation description could be directly implemented in programmable logic controllers (PLCs) and systems of supervisory control and data acquisition (SCADA) without using additional specialized tools. The results are attributed to the application of principles of equipment and procedure decomposition in accordance with the IEC 61512 standard, which makes it possible to separate process control from equipment control. A distinctive feature of the proposed approach is the possibility of modifying CIP cleaning recipes without changing the PLC program code, which reduces the time required for system reconfiguration. The results could be practically implemented in the design and modernization of automated control systems for CIP stations in the food, pharmaceutical, and biotechnology industries, as well as in the development of SCADA interfaces for controlling formulation-related processes