Description
监控程序的梯形图如图7所示。图7中定时器T1为检测元件,X001为控制对象动作信号,X002为动作完成信号,M2为报警或停机信号。假设被控对象的运行程序完成一次循环需要50s,则定时器K值可取510(T1为100ms定时器)。当X001=1时,被控对象运行开始,T1开始计时;
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