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use TOF timer with real PT input ?

Created by: alvr at: 5/7/2012 4:40 PM (5 Replies)

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5/7/2012 4:40 PM	Rate (0)
alvr Posts: 21 Rating: (0)	Hello, I am beginer with PLC and now I dont know how can I use TOF (or other timer) timer with real PT input. It is expect only TIME PT input. My situation is that I read analog input which I convert and multiply so result is REAL. How can I use or convertthis REAL value number of secondfor TOF timer or any similar timer?Thanks for every advise and sorry for my bad english :-)
alvr Posts: 21 Rating: (0)
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5/7/2012 4:54 PM	Rate (0)
0_Einstein Grandmaster-Expert Joined: 7/7/2010 Last visit: 12/30/2025 Posts: 16339 Rating: (2520)	alvr Hello, I am beginer with PLC and now I dont know how can I use TOF (or other timer) timer with real PT input. It is expect only TIME PT input. My situation is that I read analog input which I convert and multiply so result is REAL. How can I use or convertthis REAL value number of secondfor TOF timer or any similar timer?Thanks for every advise and sorry for my bad english :-) Use the CONV block to copy your REAL toa TIME value. Then you can put the TIME value into the TOF.
	science guy
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5/7/2012 5:05 PM	Rate (0)
Mc Muffin Posts: 495 Rating: (58)	Convert REAL to DInt. This could also work...
Mc Muffin Posts: 495 Rating: (58)
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5/7/2012 5:07 PM	Rate (0)
alvr Posts: 21 Rating: (0)	OK, You think convert from REAL to DINT as TIME with CONV function, yes? And when I use this DINT value for TOF timer, what unit it will be? in second, milisecond, ..?Thanks
alvr Posts: 21 Rating: (0)
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5/7/2012 5:56 PM	Rate (0)
0_Einstein Grandmaster-Expert Joined: 7/7/2010 Last visit: 12/30/2025 Posts: 16339 Rating: (2520)	When I do this, the DINT comes in as msec. However, it might be because I first tested the Timer by typing in 100ms manually though I do not think it matters.
	science guy
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5/7/2012 10:49 PM	Rate (0)
alvr Posts: 21 Rating: (0)	I will try it. Thanks for every advice.
alvr Posts: 21 Rating: (0)
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