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用软件控制数字量模板的开关量输出,触发多路转换开关,轮流切换多路信号与采集通道间的连通,实现以有限的通道对多路信号的快速采集、控制。 通常的数据采集模板AI(模拟量输入)通道都很少(8～32),在许多场合(尤其工控领域),需对大量的信号(有的高达几百、上千路)进行采集、控制,如果增加模板量来实现,成本相当高,且不易集中控制(总线插槽较少),在实时性要求不是很高的情况下,利用数控多通道切换回路,不仅充分利用上模板的高精度、快速性,还大大降低了成本。
The digital output of the digital template is controlled by the software to trigger the multiplexer to switch the connection between the multi-channel signal and the acquisition channel in turn so as to realize the rapid acquisition and control of the multi-channel signal with limited channels. The usual data acquisition template AI (analog input) channels are few (8 ~ 32), in many occasions (especially in industrial areas), the need for a large number of signals (some up to hundreds, thousands of road) to collect and control , If you increase the amount of templates to achieve, the cost is quite high, and not easy to control (less bus slots), real-time requirements in the case is not very high, the use of NC multi-channel switching circuit, not only make full use of the template on the high-precision , Fast, but also greatly reduce costs.