Abstract: Programmable logic controllers (PLCs) are widely used in automatic control of various production machinery and processes, such as power, rail, and steel. PLCs are widely used in the field of wind turbine control systems (including main control systems, pitch control systems, yaw systems, CMS status monitoring systems, and other main and auxiliary control systems), as well as wind farm monitoring systems (including SCADA systems, AGC, AVC systems, energy management systems, etc.). This article provides a brief explanation of the technical architecture, composition, and implementation methods of PLC-based wind turbine control systems. It also analyzes the current development status and existing problems of large-scale wind turbine control systems based on a certain 3MW doubly-fed wind turbine control system. Additionally, it briefly analyzes the technological development trends of PLC programmable controllers in the field of wind power control, combined with industrial control frontiers such as cloudification, distributed computing, and edge computing.