ABB produces the AC800M PM851 to meet the demand for high-performance and modular controllers in the field of industrial automation. The specific reasons include: Diverse market demands for control: Industrial automation projects have different requirements for the performance, functionality and reliability of controllers. The AC800M PM851 offers a variety of CPU modules with different processing capabilities, memory sizes and redundancy support to meet various control requirements. Openness and compatibility: The market demands controllers that can be seamlessly integrated with a variety of systems and devices. PM851 supports multiple communication protocols, such as Ethernet and PROFIBUS DP, facilitating the connection of devices from different manufacturers to achieve data exchange and system integration. Technical advantage: Modular design: PM851 adopts a modular design, allowing users to flexibly expand it based on actual needs, reducing initial investment costs and facilitating system upgrades and maintenance. High reliability: With an IP20 protection rating and comprehensive EMC certification, it can adapt to harsh industrial environments and ensure stable operation. Powerful processing capability: Equipped with a high-performance microprocessor and large-capacity RAM, it supports multitasking and real-time control, meeting the requirements of complex control algorithms and data processing. Competitive strategy enriches the product line: By launching PM851, ABB has refined the AC800M series, offering more options and enhancing market competitiveness. Differentiation advantage: PM851 features high integrity control, redundant configuration and other characteristics, meeting the requirements of safety-critical applications and forming a differentiated competitive advantage. User value enhances production efficiency: PM851 enables precise control and real-time monitoring, optimizes production processes, and boosts production efficiency. Reduce maintenance costs: The modular design and hot-swappable function facilitate maintenance and replacement, reducing downtime and lowering maintenance costs. Flexible scalability: Supports multiple communication protocols and expansion modules, facilitating system expansion and upgrade, and protecting user investment. To sum up, ABB's production of AC800M PM851 is to meet market demands, leverage technological advantages, enhance competitiveness, and create value for users.