A-series PLCs are the first-generation small ones, which can achieve 10-256 points, have the ex- tension and card-shaped design architecture and high-speed pulse multi-axis motion control, which can be widely used in the OEM field. R-series PLCs, based on M7 and A7 processor archi- tecture, the overall processing efficiency reaches the first-class level of the standard PLC, and has complete control algorithm, rich communication architecture, supports 4, 8, 12-axis motion control, which can be applied to all OEM applicatios.