SINAMICS S120 is a Siemens drive control system that integrates V/F, vector control and servo control. It can control not only ordinary three-phase asynchronous motors, but also synchronous motors, torque motors and linear motors. Its powerful positioning function will realize the absolute and relative positioning of the feed shaft. The internal integrated DDC (Drive control chart) function uses the CFC programming language of PLC to achieve logic, calculation and simple process functions. The S120 is a series of Siemens high-end applications with a maximum power of thousands of kilowatts.