P0900ET – FOXBORO

SR745-W2-P5-G5-HI-A
1769-L32E
IC755CSS12CDB
2711P-T10C4A8
1746SC-NI8U
3HAB8101-4/05A-DSQC345D
MVI56-GEC
A06B-6200-H037
MDG-M2S100N 20W 100V POLES:2 50HZ/60HZ
XO16N1-C3.0

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描述

(1)100ms通用定时器(T0~T199)共200点,其中T192~T199为子程序和中断服务程序专用定时器。这类定时器是对100ms时钟累积计数,设定值为1~32767,所以其定时范围为0.1~3276.7s。

(2)10ms通用定时器(T200~T245)共46点。这类定时器是对10ms时钟累积计数,设定值为1~32767,所以其定时范围为0.01~327.67s。

下面举例说明通用定时器的工作原理。如图1所示,当输入X0接通时,定时器T200从0开始对10ms时钟脉冲进行累积计数,当计数值与设定值K123相等时,定时器的常开接通Y0,经过的时间为123×0.01s=1.23s。当X0断开后定时器复位,计数值变为0,其常开触点断开,Y0也随之OFF。若外部电源断电,定时器也将复位。

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