12/4/2020 12:28 PM | |
Posts: 38 Rating:
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Hi all, I would like to find a solution to adjust pump speed ( using 0-10v ) based on the input from a flow meter. these aquarium pumps don't have a very steady speed and I need to be able to adjust the speed so not to create waterfall noises ( that's an aquarium term about the noise on an overflow box). So if the speed goes down, i need to increase output voltage, if speed goes up vice versa. All that against of a preset value ( can be pumpspeed or outgoing voltage). I have included the LSC file and a jpeg in a zip file. Left part is the flow meter part Righ part is the outgoing voltage control ( incl. starting value). Thanks for the help Attachmentpump control.zip (334 Downloads) |
12/4/2020 1:10 PM | |
Joined: 3/2/2020 Last visit: 2/20/2023 Posts: 70 Rating:
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Sounds like a nice little project. So what is your question? |
12/4/2020 3:17 PM | |
Posts: 38 Rating:
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"A analog output works only in 0-1000 units = 0,00 to 10,00 V in steps of 0,01 V, if you the voltage output of the modul." --> fine for me. Understood.
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12/4/2020 3:38 PM | |
Posts: 38 Rating:
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well, to be able to throtlle the pumpspeed ( 0-10v) based on the LPH input against a presetted LPH value. |
12/4/2020 4:10 PM | |
Joined: 9/27/2006 Last visit: 8/28/2024 Posts: 12279 Rating:
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Hello degregoriis; Your description of the project makes sense for some sort of closed-loop control (PID), and the LOGO! has a PI instruction that could help you. Study the entries in the LOGO! Soft Comfort online help for the PI instruction, and have a look at the following application example for a basis to your own project: PI Controller with LOGO! for Simple Applications - Optimum Motor Speed Control (Set 23) https://support.industry.siemens.com/cs/ww/en/view/23753479 “A PI controller in the LOGO! logic module adjusts the pressure by varying the motor speed depending on the pressure that is being measured. The pressure of the cooling water system is thus kept constant, independent from the number of consumers. The cooling performance is optimized and failures caused by a shortfall of pressure are prevented.” Hope this helps, Daniel Chartier |
12/4/2020 5:46 PM | |
Joined: 12/18/2014 Last visit: 8/28/2024 Posts: 33633 Rating:
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Based on your program and your wish steps in 0,01V.
AttachmentPump control test_V2.zip (335 Downloads) |
Last edited by: ixo65 at: 12/04/2020 17:59:35Attachment changed |
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