IC697VAL314
IC697VAL314
IC697VAL314
IC697VAL314
IC697VAL314
、随着纱锭卷径的增加,以PG反馈来进行PID模式控制,获得恒定线速度。
Cd071=3 选择内置PID控制模式
Cd120=99 选择以PG作为PID控制模式的反馈信号
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Cd155=1 选择PI的正负增益功能
如下图,输入变频器的运转指令,V/F控制结束,开始PID控制,指令频率与反馈频率的偏差值经过PID运算,输出频率让反馈信号跟踪指令值不断变化,实现恒定线速度自动过程控制。考虑到在收卷的工艺过程中,随着卷径增大,角速度W的减小,正负偏差的调节量不同,通过软件用户化功能,引进PI的正负增益功能,达到优化调节的目的。
2、增加卷绕曲线的控制
在线速度的控制过程中,将卷绕速度预测的图形运转作为基本控制,用以减小PID的补偿量,使控制过程更早地趋向于稳定。
·只要事先根据工艺要求输入设定卷绕开始频率、结束频率、卷绕所需时间,作为对卷粗现象的输出频率预测图形,进行自动计算。
·可以预先设定4种图形,通过外部端子信号予以选择。
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