2/11/2021 4:45 PM | |
Joined: 11/15/2019 Last visit: 9/17/2022 Posts: 28 Rating: (0) |
I deleted this post because it was on the Hardware part of the forum so I'll try here, in the right part of the forum. The displaying of Liters Per Minute in real time: So... Logo 8 12/24 RCE with flow sensor on I3. TTL to HTL converter. 477 pulses per liter. I am new to this and have no idea how I would get pulses per minute calculated to liters per minute and displayed every second or two in real time on the Logo´s display. I don't even know where to start and I've spent half of a day searching on this forum. Do you use a "Flag" to display? I guess it's I3 (flow sensor) > to something that calculates the pulses > to something that displays the value. Thanx AttachmentFlowmeter1 (1).zip (152 Downloads) |
2/13/2021 11:29 AM | |
Joined: 11/15/2019 Last visit: 9/17/2022 Posts: 28 Rating: (0) |
I´m stuck. B023 down and to the left is the message text, see attached zip. I got the counter to show in the message text but I need it to calculate and display 4,16 pulses as 1 cl = 0.01, per minute. I would like it to display the LPM with two decimals every 0.50 sec. I have tried to understand the mathematical instruction but I´m lost. AttachmentFlowmeter4.zip (152 Downloads) |
2/13/2021 1:46 PM | |
Joined: 2/22/2008 Last visit: 8/6/2024 Posts: 2698 Rating: (207) |
It's not so difficult, you must think in steps to get the result. See example in attachment und use frequency 477 Hz in simulation mode for I3.If you use the gate time 1s for B001, then you get 477 at the output with 477 Hz, okay ? Now we only need an arithmetic block to calculate the flow in liter per minute. 1 minute are 60 seconds, therefore multiply by 60. You want 2 decimals, then multiply by 100. At the end only devide by 477 to get liter from pulses, that's all. The counter is only for volume as example. Normally you have to cascade an additional counter to get higher volumes. Change hardware to appropriate type of your Logo controller. Regards, Scorp AttachmentExample Flow.zip (199 Downloads) |
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