1C31203G01
1C31203G01
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厦门莫格电气自动化有限公司
:祖巧丽
:
PLC一般采用硬件定时中断,软件计数的方法来实现定时逻辑功能,定时器一般包括:
定时条件:控制定时器操作。
定时语句:所使用的定时器,给出定时设定值。
定时器的当前值:记录定时时间。
定时继电器:定时器达到设定的值时为“1“(0N)状态,未开始定时或定时未达到设定值时为“0”(0FF)状态。
其逻辑功能如下表所示:
定时器:T
a.功能:该元件是定时用的,范围为0.001~32.767(1ms定时器)秒、0.01~327.67秒(10ms定时器)、0.1~3276.7秒(100ms定时器)。元件范围按十进制分配如下:
T246~T249:1ms定时器
T200~T245:10ms定时器
T0~T199:100 ms定时器
b.举例:
①梯形图:
②程序清单
LD X000
OUT T0 K123
LD T0
OUT y000
END
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