Is spinning frame cleaning bristle circuit is closely spun in control of improved generation PLC based on original siemens S7 who closely spins the spinning frame from the area the 200PLC controllerutilizes current simulation time relay programming, its characterized in that: with S7 Q0.7 output interface in the 200PLC controller passes through the wire to be connected with contactor K4 one end, and contactor K4's the other end and 220V power cord are connected, utilize inside " soft relay " or title " virtual relay ", through the establishment to PLC controller input interface I0.1 input program, come the automatic start of accurate control cleaning bristle motor, the time of moving, stopping, inside " soft relay " that sets up of PLC controller or title " virtual relay " make output interface Q0.7 export power supply signal to the contactor K4 of control PLC controller external connection gets electricly, contactor K4's normally open contact actuation, and drive cleaning bristle motor starts the operation, or stops.