1746-NO4V
1746-NO4V
1746-NO4V
在现场输入触点后加一定时器，定时时间根据触点抖动情况和系统要的响应速度确定，一般在几十ms，这样可保证触点确实稳定闭合后，才有其它响应。模拟信号滤波可采用图
程序设计方法，对现场模拟信号连续采样次，采样间隔由转换速度和该模拟信号变化速率决定。次采样数据分别存放在数据寄存器中，当***后次采样结束后利用数据比较、数据交换指令、数据段比较指令去掉***大和***小值，保留中间值作为本次采样结果存放在数据寄存器中
提高读入现场信号的可靠性还可利用控制系统自身特点，利用信号之间关系来判断信号的可信程度。如进行液位控制，由于储罐的尺寸是已知的，进液或出液的阀门开度和压力是已知的，在一定时间里罐内液体变化高度大约在什么范围是知道的，如果这时液位计送给PLC的数据和估算液位高度相差较大，判断可能是液位计故障，通过故障报警系统通知操作人员检查该液位计。
＆ 公司全称 ： 厦门泰尼电气有限公司
＆ 销售代表 ： 小黄
＆ 洽谈电话 ： 0592-6809319
＆手机：18950191386
＆ 商务 *** ： 2917675397
＆ 传真（FAX)： 0592-6890859 （请注明，01006收）
＆ 公司地址 ： 厦门市海沧区海沧街道滨湖一里7号
＆ 公司网址 ：
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NEXEN LOAD BASED TENSION CONTROLLER TC820 NEXEN 964350
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MODICON PROIBUS 467NHP81100 PCMCIA BOARD