3500/32-01-01 3500/32-01-01
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[关键词] 分散控制系统(DCS)可编程序控制器(PLC)安全仪表系统(SIS)MOTOROLA MVME 工业用模组 压缩机组控制系统(CCS)ESD系统;振动监测系统卡件
阳工 1 7 7 8 6 0 3 2 5 1 6 +2 1 7 7 4 9 6 9 4 6
【3500/42M】 【3500/42M】
PLC的应用领域非常广泛,在钢铁、石油、化工、电力等各个行业都可以看到PLC的应用,PLC即可以进行开关量的逻辑控制
又可以进行模拟量的控制,只需要配备相应的IO模块和配套装置即可。
我们还销售:本特利 监测系统
AB PLC模块
ABB DCS系统
西屋OVATION系统
施耐德 140系列
GE 通用电气等品牌中:
PLC模块,DCS模块,CPU模块,IO模块,DO模块,AI模块,DI模块,网络通信模块,以太网模块,运动控制模块,
模拟量输入模块,模拟量输出模块,数字输入模块,数字输出模块,冗余模块,电源模块,继电器输出模块,继电器输入模块,
处理器模块。
武汉夏通不论是销售全新备件,还是停产备件,致力于以{zd1}成本,{zy}质高效的方式让企业恢复正常运作。
、延迟输入法
IN—输入
OUT—输出
TIME(ET)—延时时间
TON—延时输出(其曲线如下图)
注释:当输入IN=1时,启动计数器直到计时时间(PT)=延时时间,OUT=1。当计数器计时时间〈延时时间,OUT=0。延时时间{zh0}取1S以内。
优点:xx了短时的周期干扰。
缺点:响应速度慢,不利于信号的快速传输。
二、减少模拟量输入扰动的方法
1、限幅法
MOVE—移动保持指令(使能端EN=1,OUT=IN。EN=0,OUT保持前次值)
GE—大于等于指令(OUT=1,IF IN1≥IN2)
LE—小于等于指令(OUT=1,IF IN1≤IN2)
HL—上限设定值
LL—下限设定值
注释:当模拟量输入信号在HL和LL之间时,OUT=IN。当IN-AI信号超出或等于HL或LL时,GE或LE判断IN-AI信号,使OUT1或OUT2输出“1”去封MOVE,从而保持MOVE的输出为HL或LL的设定值。也就起到了限幅的作用。
优点:能有效克服因偶然因素引起的脉冲干扰。
缺点:平滑度差。
2、延迟滤波限幅法
MOVE—移动保持指令(使能端EN=1,OUT=IN。EN=0,OUT保持前次值)
GE—大于等于指令(OUT=1,IF IN1≥IN2)
LE—小于等于指令(OUT=1,IF IN1≤IN2)
HL—上限设定值
LL—下限设定值
LG—延迟滤波指令(其曲线如下图)
TIME—延迟滤波时间
注释:功能基本和限幅法相同,只是在输入端增加了一个延迟滤波器,对输入信号起到了延迟缓冲的滤波。
优点:有效地抑制了周期性的脉冲干扰。平滑度比限幅法有所改善。
缺点:信号响应速度减缓。
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