PacFramework: Technological Solutions for PLC/PAC Programming

This technical report presents PACFramework (PFw), an open framework designed to support the development of application software for programmable controllers (PLC/PAC) and SCADA/HMI systems. PFw addresses common challenges in industrial automation by offering a structured, reusable, and standardized software architecture based on international standards such as ISA-88, ISA-95, and IEC 61131. The framework incorporates engineering best practices for diagnostics, alarm handling, simulation, contextual variable modeling, and system integration. Supporting tools, such as PFwTools and PFwIoTGateway, enable automated code generation, commissioning, and integration with IIoT and MES platforms. Drawing on years of practical experience, PFw is suitable for a wide range of industrial projects, from small-scale systems to complex multi-device architectures. The report also outlines the motivation and roadmap for PFw2, the next version of the framework, aimed at deeper integration with DevOps principles and Digital Twin technologies.