Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

Underfloor mixinvalve 0-10V

Created by: nogoodwithlogo at: 10/13/2019 1:34 PM (36 Replies)

Rating (0)

Thanks 5

Result pages:: |; 1 | 2 | 3 | 4; |

37 Entries

Entries per page: 10 | 20 | all

10/14/2019 7:38 PM	Rate (0)
nogoodwithlogo Regular Member Joined: 5/7/2018 Last visit: 11/5/2024 Posts: 25 Rating: (0)	By the way, which one is easier to program / more reliable way to control mixing 3-way valvemotor? - control signal 0-10V, 0V=0%, 10V=100% open for example -2 relays that drives the valve open and close with pulses I just noticed i have Belimo 24VAC valvemotor which is relay controlled with the current Ouman 201 system. I was sure i had 0-10V valvemotor...... But i already ordered the AM2 AQ... and the current valvemotor is 12yrs old, so i might as well just chage it to a new 0-10V valve.

Suggestion To thank Quote Answer

10/14/2019 7:46 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/7/2024 Posts: 34149 Rating: (4254)	This is the same as the piece by piece of your requirements .... First, think about what you want .... And not again a new variant ....

Suggestion To thank Quote Answer

10/15/2019 11:53 AM	Rate (0)
nogoodwithlogo Regular Member Joined: 5/7/2018 Last visit: 11/5/2024 Posts: 25 Rating: (0)	I was just asking which valvemotor would be better / easier to control with logo. I have 24VAC motor atm, but i can change it to a 0-10V motor, if it makes my system more reliable or easier to control. I think the 0-10V would be better, but as you can clearly see, I am not that good with LOGO. Any help with adjusting the heat curve?

Suggestion To thank Quote Answer

10/15/2019 12:05 PM	Rate (0)
Luna08 Experienced Member Joined: 5/13/2016 Last visit: 1/15/2022 Posts: 66 Rating: (5)	I think an analogue controllable valve has a better accuracy in terms of controlling the opening. If it needs to be extremely reliable you can also choose for a valve with a analog feedback to confirm the angle of opening. Regarding the rest of your program: I think it would help if you provide a drawing (simple sketch) of the entire system. This can help people understand what you want to achieve. At this point we have various questions of which we can hardly see their relations.

Suggestion To thank Quote Answer

10/15/2019 2:25 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/7/2024 Posts: 34149 Rating: (4254)	nogoodwithlogo btw, there are tons of adjustments to make to the setpoints etc.. How can i adjust the temperature curve? for example outside temperatures: -30c water should be 37c 0c water should be 25c 30c water should be 18c these values just for example. As already written, your desired heating curve is not linear. For your specifications with 3 Corner points must be made 2 heating curves. Normally, Gain and Offset are not calculated for the curve in the LOGO! program because the LOGO! only knows integer values. You wrote, your specifications are only examples. If you want to change these, both heating curves must be recalculated each time. Do you want to specify only the corner points with the display and make the calculation in the LOGO!, this is relatively expensive. A LOGO! is not a specially tailored heating control designed to calculate heating curves, but a better, programmable relay.

Suggestion To thank Quote Answer

10/15/2019 3:17 PM	Rate (0)
nogoodwithlogo Regular Member Joined: 5/7/2018 Last visit: 11/5/2024 Posts: 25 Rating: (0)	Ok, i attached my "masterpiece" here.. I'll write bit later some info how i would like to be controlled ;) Attachment system.jpg (302 Downloads)

Suggestion To thank Quote Answer

10/15/2019 3:23 PM	Rate (0)
nogoodwithlogo Regular Member Joined: 5/7/2018 Last visit: 11/5/2024 Posts: 25 Rating: (0)	ixo65 As already written, your desired heating curve is not linear. For your specifications with 3 Corner points must be made 2 heating curves. Normally, Gain and Offset are not calculated for the curve in the LOGO! program because the LOGO! only knows integer values. You wrote, your specifications are only examples. If you want to change these, both heating curves must be recalculated each time. Do you want to specify only the corner points with the display and make the calculation in the LOGO!, this is relatively expensive. A LOGO! is not a specially tailored heating control designed to calculate heating curves, but a better, programmable relay. So a linear ( 2 point) curve is much easier to do? It should work fine aswell.

Suggestion To thank Quote Answer

10/15/2019 3:31 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/7/2024 Posts: 34149 Rating: (4254)	A curve with 3 Points wants 2 heating curves. In your example curve 1 from -30 °C to 0 °C and curve 2 from 0 °C to 30 °C (outdoor temperature). The curves have different values for gain and offset. The calculating is the same but you must make 2 calculations. And Analog-Muxes for switching the values.

Suggestion To thank Quote Answer

10/15/2019 5:57 PM	Rate (0)
nogoodwithlogo Regular Member Joined: 5/7/2018 Last visit: 11/5/2024 Posts: 25 Rating: (0)	So basically what i want system to do is: Make hot water: -control the burner (Q1) with the tank temp (AI2), with adjustable hysteresis (B003) -when the flue gas temp (AI3) or the boiler temp (AI1) is over setpoint and the burner (Q1) is running i want the load pump (Q2) on, so it transfers the heat in to the tank. -when the burner (Q1) is stopped, by error (I1 or I2) or by the tank temp sensor (AI2), i want load pump (Q2) to stop after delay (B011) to prevent boiler to overheat. Control the floorheating system temperature: -control the mixingvalve (AQ1) so the water temp for the floorheating is right temperature for the current outdoor temperature (AI6) -Protect the underfloor heating with adjustable water temp limit (B024) so it wont rise above setpoint (+45c), when over limit, mixvalve (AQ1) is closed and it that does not help, then the pump (Q3) is shut down. -stop the heating pump (Q3) if the water OUT temp (AI5) is hotter than the water IN temp (AI4) and turn it back on after some time, maybe 3hrs and run for 1hr with out stopping to the AI5 temp. Other stuff: -I have small UPS providing electricity for my pumps and burner etc. BUT if there is long blackout and the system shuts down, I want the LOGO to wake up and continue business as usual, automatically, when the power is back on. -also have some outdoor lights, but thats not important atm. I know I should have started this thread with this post, but better late than never... I believe i have made tons of mistakes with my diagram and I would appreciate any help from here :) Latest .zip attached. edit: now it is I/O listing: AI1 Boiler temp AI2 Tank temp AI3 Flue temp AI4 Water IN temp AI5 Water OUT temp AI6 Outdoor temp I1 Overheat protection I2 Burner error I3 Lux relay I8 System On AM1 AM3 AM4 AQ1 0-10V mixing valve Q1 Burner Q2 Load pump Q3 Heating pump Attachment heatingsystem.zip (299 Downloads)
	Last edited by: nogoodwithlogo at: 10/15/2019 18:16:50 Last edited by: nogoodwithlogo at: 10/15/2019 18:19:40 Last edited by: nogoodwithlogo at: 10/15/2019 19:13:36
Suggestion To thank Quote Answer

10/15/2019 7:38 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/7/2024 Posts: 34149 Rating: (4254)	In attachment an example for calculating of 2 heating curves. 1 x LOGO! program. 1 x Excel file for calculating Gain and Offset. Attachment Heating curve.zip (320 Downloads)

Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users nogoodwithlogo

Result pages:: |; 1 | 2 | 3 | 4; |

37 Entries

Entries per page: 10 | 20 | all

|

Share this page:

Share this page on...

Related topics by keywords:

Follow us on