Sinamics S120 is a new drive control system launched by Siemens that integrates V/F, vector control, and servo control. It can not only control ordinary three-phase asynchronous motors, but also synchronous motors, torque motors, and linear motors. Its powerful positioning function will achieve absolute and relative positioning of the feed axis. Internally integrated DCC (Drive Control Chart) function, using PLC's CFC programming language to implement logic, operations, and simple process functions. The DC/AC inverter with a common DC bus is commonly known as the Sinamics S120 multi axis driver. Its structural form is that the power module and motor module are separated. One power module rectifies the three-phase AC power into 540V or 600V DC power, and connects the motor module (s) to the DC bus. It is particularly suitable for multi axis control, especially in industries such as papermaking, packaging, textile, printing, and steel. The advantage is energy sharing between the motor shafts, convenient and simple wiring. The AC/AC frequency converter with single axis control, commonly known as Sinamics S120 single axis AC drive, is composed of a power module and a motor module integrated together, and is particularly suitable for single axis speed and positioning control.