IC752CBT050
IC752CBT050
IC752CBT050
IC752CBT050
IC752CBT050
系统在启动时,我们不能用自动控制,所以设置一个手动控制功能。当我们采用手动控制时,我们是电动调节阀处于全开状态,PLC不再起控制作用而相当于一个接口。入汽流量我们有手动控制阀门来控制。设定值、循环水泵的转速可以在触摸屏上来设定。
(三) 报警与保护
补水失灵报警:再补水过程中,我们设定一个时间延迟程序,如果在实际中补水泵在这个时间内仍未工作,即循环水泵的转速和出水压力都未发生变化,我们就要报警。同时,使系统自动停机。
循环水压力过低报警:如果我们设定一个压力下限值(该值在编程时设定),如果采集的循环水压力低于该值,我们就通过程序让其报警。同时强制停机。
超负荷报警:我们设定一个出水温度与入水温度的最大差值(该值在编程时设定),如果我们采集的两值之差大于该值时,我们就认为系统超载,就让其报警。同时停机,以方便检查。
停电报警:当系统断电时,设定报警,同时使电动阀关闭,停止送汽。
当然,我们对于以上报警都设定为声、光报警。
(四) 触摸屏显示
在该系统中我们采用触摸屏来实现系统的实时观测。并且可以在手动时设定系统的各个参数,报警显示等功能。我们设定了六个界面,主界面、手动参数设定界面、实时数据界面、历史数据界面、曲线界面(包括实时曲线和历史曲线)、报警界面。
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