JZNC-MRK09-1

发布时间:2017-02-10

JZNC-MRK09-1

JZNC-MRK09-1

JZNC-MRK09-1

16、什么是模拟量和数字量? 
模拟量是指连续变化的信号(如4~20mA,0~5v);数字量是只有开关状态的信号。 
17、I/O信号是如何分类的? 
常用的I/O信号一般分为:AI、AO、DI和DO。 
AI--模拟量输入信号 
AO--模拟量输出信号 
DI--数字量输入信号 
DO--数字量输出信号 
18、什么是DCS的开放性? 
DCS的开放性是指DCS能通过不同的接口方便地与第三方系统或设备连接,并获取其信息的性能。这种连接主要是通过网络实现的,采用通用的、开放的网络协议和标准的软件接口是DCS开放性的保障。我公司目前采用的DCS系统有很好的开放性。 

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