FBM231 Foxboro FOXBORO Controller. Shanghai Sijian Intelligent Technology Co., Ltd. is engaged in technical development, technical consultation, technical transfer in the fields of intelligent technology, information technology, and automation technology, as well as the sales of electrical equipment, automation equipment, electronic products, communication products, and electromechanical products. Industrial automation products include: PLC, DCS, sensors, frequency converters, encoders, relays, servo drives, soft starters, and touch screens. Product brands involved: Eurotherm, Schneider, Siemens, ABB, SICK, P+F, E+H, Yokogawa, Yamakawa, Mitsubishi, Emerson, Honeywell, FANUC, GE, Eaton Electrical, CT. The PCS pitch system, as shown in the figure below, includes a Center Box (central cabinet) and three Blade Pitch Drive Control Cabinets. Compared to pitch systems from other companies, the PCS central cabinet design is relatively simple, does not use a PLC for control functions, and only performs the distribution of 400V power, UPS power, and signal lines. The main control cabinet layout includes: main switch, fuses, filters, lightning protection components, and other possible additional components requested by the customer. 
FBM231 Foxboro FOXBORO Controller system's three Blade Pitch Drive Control Cabinets include: backup safety system, drive control, battery management, diagnostic functions, etc., implemented through their respective PMM modules*. Compared to other pitch systems, it offers greater redundancy and excellent reliability.
Depending on the type of drive motor selected by the customer, the wiring and layout of the Blade Pitch Drive Control Cabinet vary slightly. Based on the motor type, the PCS system can be divided into AC and DC types. Utilizing innovatively designed components such as PMM, PMC, and PBS, the application of large-scale integration technology enhances system reliability, presenting a very modern, state-of-the-art solution.
PLCs made using single-chip microcomputers have the following notable features: they create conditions for the integration of mechanical and electrical equipment, as PLCs made from single-chip microcomputers are smaller in size. At the same time, PLCs have strong logical functions and are equipped with numerical operations and communication interfaces.
Using bit-slice microprocessors as CPUs, the main characteristics of bit-slice microprocessors are: high speed, strong flexibility, and high efficiency. They can be "cascaded" and are easily adapted for "pipeline" operations.