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retentivity after counters

Started by mehtab, 9 Jul 2013

1 post in this topic

Posted 9 Jul 2013

why retentivity of timer does not maintain after using counter in s7 200 cpu 222 cn?? i use 1 counter , when it completed and timer reaches to its value.but when i power off main supply. timers become zero(retentive timer),even i didnt reset the timers. is there any retentive timer in s7 200????? tell me what should i do??? please reply me fast..... THANKS in advence to all experts..

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