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S7 Timer Problem

12/26/2013 9:43 AM	Rate (0)
kelese Posts: 18 Rating: (0)	Dear Sirs, Could anybody please explainwhat happens insidetwo videos in differentconditions, why timer doesn't work properlyesspecially in one example? I'm confused!! Attachment timer.zip (181 Downloads)
kelese Posts: 18 Rating: (0)
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1/3/2014 1:33 PM	Rate (0)
Piotr.M Platinum Expert Joined: 6/24/2013 Last visit: 9/18/2025 Posts: 1696 Rating: (433)	in first example it looks like timer setpoint = 0 and it may not produce raising edge for 1st timer. when entered value reverted to 0. when condition do not change at all You may get situation where nothing happen because timer always start on raising edge [i.e. when signal is ON and PLC starts timer will not start so use 1st scan bit to create edge in 2nd scan] hope this helps Piotr

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