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.

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?

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. 

Ok, i attached my "masterpiece" here..

I'll write bit later some info how i would like to be controlled ;)

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.

-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