PLC实现重复定时
PLC实现重复定时
PLC实现定时器复位其实是一个很简单的问题，无奈脑子太笨，想了一下午才搞定，写一个小的测试程序如下：
PROGRAM _CYCLIC
(* Insert code here *)
TON_0(IN := cmd,PT := T#3s);
status := TON_0.Q ;
IF status = 1
THEN
cmd := 0;
light := 0;
ELSE
light := 1;
END_IF
END_PROGRAM
TON_0是一个TON功能块实例，使用方法如下：
| I/O | Parameter | Data Type | Description |
|---|---|---|---|
| IN | IN | BOOL | Input signal |
| IN | PT | UDINT | Delay time in 10 ms steps |
| OUT | Q | BOOL | Output signal, the rising edge of the input signal is delayed by PT |
| OUT | ET | UDINT | Elapsed time in 10 ms increments |
