在數位的時代，一切都是CPU的時脈來決定一切，
所以沒有所謂的立刻，還是要經過CPU的運算，再輸出結果。
再簡單不過的
-|X0|-------(Y0)-
X0觸發Y0輸出。
如果是一般的要求，就知道是立即輸出。
如果是高速的機構，其實已經DELAY了1個掃描時間約(10~20ms)。
因為輸出接點通常是在掃描結尾才會輸出。
假設：機構速度80米/分鐘，10ms已經差了13mm左右。
一般光電感應器的sensor也是有反應時間，約 ns級。
如果機台沒需求這麼高，就不要為難自已，無視這些誤差吧!!
2012年6月15日 星期五
2012年6月14日 星期四
High-power protection circuit for PLC
All transistor outputs of DVP-ES2/EX2 series PLC contain diode for back EMF protection, which is sufficient for small-power conductive load and average ON/OFF application frequency.
However, in big-power or high ON/OFF frequency environments, please connect to another suppression circuit (as shown in the figure below) to lower the noise and prevent damages on the transistor output circuit resulting from over-voltage or overheating.
The transistor outputs are all open collector; therefore, if Y0/Y1 is set to be pulse output and to ensure the transistor module works normally, the pull-up resistor has to be maintained at output current > 0.1A.
Circuit wiring for transistor output:
information sources:DELTA
However, in big-power or high ON/OFF frequency environments, please connect to another suppression circuit (as shown in the figure below) to lower the noise and prevent damages on the transistor output circuit resulting from over-voltage or overheating.
The transistor outputs are all open collector; therefore, if Y0/Y1 is set to be pulse output and to ensure the transistor module works normally, the pull-up resistor has to be maintained at output current > 0.1A.
Circuit wiring for transistor output:
information sources:DELTA
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