【摘要】 根据国产造纸机定量控制的要求,设计了定量阀控制器,以S7-200PLC作为主控单元,能根据DCS系统的控制方式接受脉冲或电平控制信号,经控制器转换成步进驱动器的控制脉冲使阀芯按照规定的转角旋转,采用精密角位移传感器检测阀位,由数显测控仪就地显示及远传,使用Profibus-DP总线接口与控制系统通讯。该阀门已经在浙江富阳一造纸机上试用,取得了良好的控制效果和经济效益。更多还原

【Abstract】 A basis weight valve controller was developed according to requirements of paper machine. In this scheme the PLC S7-200 was used as main control unit,pulse duration model and time duration model can be chosen based on the DCS system,the signal can be converted into control pulses of the stepper motor driver to drive the valve to rotate flown in the right order,the valve position was feed back by a high precision potentiometer and a digital display controller was used to show the percentage value,use Profibus-DP protocol to communicate with the control system. The products developed in this paper have been using in a paper machine in Fuyang city,Zhejiang province and satisfactory control performance and economic benefit are obtained.更多还原