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启停信号
[计] start stop signal
- 信号采集系统与计算机（上位机）实现串口通讯，以便数据传输和处理，同时控制步进电机启停与运转。
By adopting MSComm ActiveX, the software is connected with the lower computer to control data communication and step motor. - 自动控制时，PLC根据进水压力传感器提供的压力信号，判断是否启、停加压泵。
Under automatic control mode, the PLC judges whether opened or stopped the pressure pumps by the pressure signal which provided by hydraulic pressure sensor. - 正弦机输出信号具有引导过程，保证高炮在启、停过程中速度平滑过渡。
In order to get smooth velocity when the flowing system started or stopped, the paper adopts the guide function method in the output control of the sine machine.
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