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Find time between two button presses

Created by: aqueousdan at: 11/17/2017 2:30 PM (3 Replies)

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11/17/2017 2:30 PM	Rate (0)
aqueousdan Experienced Member Joined: 4/23/2015 Last visit: 10/21/2024 Posts: 38 Rating: (1)	I'm really sorry if this is super basic but I'm having trouble doing it properly! I am trying to count the time it takes to complete a cycle of a process. I am simply taking an input to the PLC from a switch that happens once every full cycle. I have been trying to use MOVE to move the HOURS, MINUTES and SECONDS from the current time of day and then doing that again and trying to take the difference but I don't seem to have much luck. I simply want to move this calculation once its done, into a memory block for our SCADA system to read. Can anyone point me in the direction of this really embarrassingly easy problem

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11/17/2017 2:46 PM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 9/28/2025 Posts: 4718 Rating: (510)	aqueousdan I'm really sorry if this is super basic but I'm having trouble doing it properly! I am trying to count the time it takes to complete a cycle of a process. I am simply taking an input to the PLC from a switch that happens once every full cycle. I have been trying to use MOVE to move the HOURS, MINUTES and SECONDS from the current time of day and then doing that again and trying to take the difference but I don't seem to have much luck. I simply want to move this calculation once its done, into a memory block for our SCADA system to read. Can anyone point me in the direction of this really embarrassingly easy problem It's easyer just to add PLC cycle time to a variable1 continually. When the switch is activated, move variable1 to variable2 and after this move 0 to variable 1.

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11/17/2017 3:12 PM	Rate (0)
jacek d Platinum Expert Joined: 9/23/2005 Last visit: 9/26/2025 Posts: 5122 Rating: (768)	Let's start from the beginning. And the beginning is described here.
	Regards, Jacek What is confusing you is the fact that you never see a number but always its digit representation. So you end up thinking that the number is the representation. - Andrej Bauer Any claims against me - based on whatever legal reason - resulting from the use of any code and/or ideas presented on this forum shall be excluded. #StayWithUkraine
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This contribution was helpful to 1 thankful Users grrrrrroooo

11/17/2017 3:21 PM	Rate (0)
crazyCow Gold Member Joined: 12/4/2009 Last visit: 9/24/2025 Posts: 453 Rating: (137)	aqueousdan I'm really sorry if this is super basic but I'm having trouble doing it properly! I am trying to count the time it takes to complete a cycle of a process. I am simply taking an input to the PLC from a switch that happens once every full cycle. I have been trying to use MOVE to move the HOURS, MINUTES and SECONDS from the current time of day and then doing that again and trying to take the difference but I don't seem to have much luck. I simply want to move this calculation once its done, into a memory block for our SCADA system to read. Can anyone point me in the direction of this really embarrassingly easy problem aqueousdan in the right pane go to Instructions -> Timer operations -> TONR (Time accumulator). Use input IN to count time (when your process is active apply logical TRUE to this input). Use TONR output to represent time on the HMI. Use R to reset timer to zero. Hope this helps. Regards.
	If this post actually helped, you may consider using the Rate button above.
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