... 4T45 and below is built inDC brake capacityDC brake start frequency: 0.00~600.00HzDC brake current: 0 ... , free switch between four-segment acceleration/deceleration time, motor thermal protection, flexible fan action control, process PID control ... multi-functional key setting, droop control, parameter identification of asynchronous and synchronous motors, weak magnetic control, high-precision torque ...