This study aims to address the technical blockade of programmable control systems， which are the core control component of manufacturing equipment， and to break through complex technical systems for the integration of mechanics， electronics， computer science， bus communications， and other disciplines. In addition， it responds to the "Made in China 2025" and "Industrial Strong Foundation Project" independent and controllable development goals. This study analyzes the development process and technical system of a programmable control system and proposes a composition scheme based on a real-time Ethernet field bus. The working principle and key technologies of the field bus， master-slave hardware， software integrated development environment， man-machine configuration software， and other components in the composition scheme are explained. Furthermore， various research methods and the development of a technology ecology are proposed to achieve independent controllability. The solutions for key technologies provide a reference for the safe and stable development of the Chinese equipment manufacturing industry.