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产品型号:DSQC609
产品品牌:ABB
PLC内部具有丰富的软元件,如定时器、计数器、辅助继电器等,利用它们来设计一些程序,可以屏蔽输入元件的误信号,防止输出元件的误动作。在设计应用程序时,可以利用"看门狗"方法实现对系统各组成部分运行状态的监控。如用PLC控制某一运动部件时,编程时可定义一个定时器作"看门狗"用,对运动部件的工作状态进行监视。定时器的设定值,为运动部件所需要的最大可能时间。在发出该部件的动作指令时,同时启动"看门狗"定时器。若运动部件在规定时间内达到指定位置,发出一个动作完成信号,使定时器清零,说明监控对象工作正常;否则,说明监控对象工作不正常,发出报警或停止工作信号。 PLC停止在某些输出被激励的地方(通常是处于中间状态)。查找与处理:查找引起下一步操作发生的信号(输入、定时器、线川、鼓轮控制器等),将编程器置于显示那个信号的ON/OFF状态。
厦门仲鑫航自动化设备有限公司
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Mitsubishi HA-FE43
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Cutler 58-4983
Motch D185027
Litton PWB400083-01
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Toyoda DIS-TP-1880-5
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Automotion ALC15D1-010-101
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Tyrolit PH7631
Giddings 502-02721-50
Cincinnati 3-531-3490A
Giddings 502-02723-83
AB 1785-LT
Marposs 6349340100
Berg 24GCF-100Ft
Parker GAW151P-A81V-A
Symbol DS3408-SF20005
GE 44A398795-G01
Toyoda TP-1917-0
SMC MGGLB40-600
GE/Fanuc 44A391746-G01
Atlas 4240031101
AB 7300 UPJ-1
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DSQC609