怎样在定时器运行中改变定时时间

2025-04-05 17:32:43
推荐回答(1个)
回答1:

定时器在运行时是不允许更改定时时间的,否则会造成定时器不工作
当定时器不运行的时候只需要更改将TV端设置成DB地址或者其他的变量地址,改变该地址内的值就可以了
方法如下:
1:在DB块里设置DINT数据,TIME数据和S5TIME数据; 2:使用MOV转换DINT数据转为TIME数据;
3:使用FC40系统Function将TIME数据转换为S5TIME数据;
使用结果:可以即时改变S5TIME计时器设置值,但是在S5T计时器重新启动以前不会生效。不过可以将新设定值和S5T计时器的BCD值做减法运算,作为设定值给入S5T计时器,并重新启动S5T,这样就可获得S5T计时器的计时移植和接续计时。
3. 1.建立DB6数据块,其中TIME变量TIME1 _TIME为WINCC设定值,S5TIME变
量TIME1 _S5T为定时器使用值;
2.WINCC中建一个32位有符号浮点数,改变格式:LongToSignedDWord,连接DB6,双字,地址DBD16(DB6中TIME1 _TIME的地址)

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