5/13/2019 4:32 PM | |
Joined: 1/6/2018 Last visit: 9/16/2023 Posts: 52 Rating:
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I've took the basic shutters application, and made it run based to temperature. The project is that I want to heat water up to 70 celcius as efficiently as possible, using solar panels. So, 0-100 celcius is the range. As you can see, the shutter has 3 points where I want it to stop. Fully open, in the middle and fully closed. Since this is a forced circulation system, I took almost all the measurements at the circulator, as I think this is proper and safe enough for the circulator. My question is, I've managed to use it as desired most of the time. The problem is, that in the 55-67 temp section when temp is falling, If I connect a Nand(edge) and that to the open position, this operates as supposed and opens the shutter. The problem is, that it does the same when the temperature is rising (exceeds 67 temps) and this is a problem. How can I make it recognise that when temperature is rising I do not want it to operate? [snip] AttachmentSun.zip (714 Downloads) |
Last edited by: atsimas at: 05/13/2019 16:33:36Last edited by: atsimas at: 05/13/2019 18:41:16Last edited by: Jen_Moderator at: 05/14/2019 13:16:00Removed link, because the file is already added. |
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5/13/2019 5:02 PM | |
Joined: 12/18/2014 Last visit: 8/30/2024 Posts: 33647 Rating:
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Please don't use file hosters. ZIP your LSC file and attach the ZIP file. Thanks. |
5/13/2019 5:11 PM | |
Joined: 12/18/2014 Last visit: 8/30/2024 Posts: 33647 Rating:
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Swap the values for the ON and OFF parameters and negate the output of the threshold trigger. |
11/13/2020 9:13 PM | |
Joined: 1/6/2018 Last visit: 9/16/2023 Posts: 52 Rating:
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I Just want to make a presentation on what I presume is almost the final edition. I want to make an automatic shade for my solar panels to avoid overheating of the forced circulating solar heater. (This arose because I overestimated the power of the sun and basically I damaged the insulation of the boiler. Also because I want to put the boiler under the solar panels, to upgrade the insulation for the winter) And control the pump, secondary. So the main temp is circulator temp (AI1), as it must be the cooler in the system, and AI2 in the collector, (before the boiler) works as a comparison , obviously you don't want to cool your medium. This is situated in the middle left. Actuation Control for the pump is situated in the top middle. Timing things have been added because if the circulator stops you must operate it once in a while, to take measurments. Also not in the night. In the top left are the redundant logo controls, operate I4 and it goes into manual. The program works this way Situated in the bottom left I1, I2, I3 are limit switches, activated when the shutter passes over them. Obviously, when all the way Down (I3) Both I1 (top) and I2(middle) are active, and this did not work, so I've put time restrictions. The limit switches are active by default of the machines, so the on position is actually the off. There is one trigger active b010 in I2 when temp is 53-68c because I did not want it to stop in the middle, during a power failure, but rize all the way to I1 top, and generaly this trigger if applicable must be active before situated in the middle right, circulator average value b062 kicks in, takes a reading and lowers it in the bottom (I3),if over 70 (trigger b055) and middle (I2) if 55-67 (trigger b039). Trigger b052, if applicable obviously propels it to I1 etc. But I wasn't content at just that and put two mathematic instructions (derivatives) situated in the middle, just to make sure that if temp fluctuates more than enough I delete or reinforce middle I2 or b039 trigger because I want formula 1 realm performance. In the bottom centre are information and failure messages. In bottom right some makeshift timing restrictions because I wasn't content with the factory delays. In the top right is the activation circuit of the shutter. Explains itshelf. Testing Obviously the time sampling of b062 average value is the most crusial factor for testing, I like 15 seconds followed by 10 seconds for the b007 average value of I2(active when 53-68). Obviously speed of the shutter is instantaneous. You position your eyes on the result situated in top right Activation circuit. Simulation. You operate only I1 I2 I3 where are the limit switches for the shutter and basically AI1 circulator temp. Give it hell and winter. AttachmentΗλιακός.zip (650 Downloads) |
Last edited by: atsimas at: 11/13/2020 22:43:41 |
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This contribution was helpful to
2 thankful Users |
12/26/2020 6:19 PM | |
Joined: 1/6/2018 Last visit: 9/16/2023 Posts: 52 Rating:
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Also I added redundant circuits in case something fails and an interface. AttachmentΗλιακός V2.zip (621 Downloads) |
Last edited by: atsimas at: 12/26/2020 18:22:06Last edited by: atsimas at: 03/03/2021 17:08:27 |
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