Underfloor mixinvalve 0-10V

Hey

I would like to control my underfloor heating water temp with logo.

Here is the system:

PT100 outdoor temp ( AM2 RTD)

PT100 water temp (to the system) ( AM2 RTD)

PT100 water temp (from the system) ( AM2 RTD)

0-10V mixing valve (AM2 AQ)

Logo does not control the room temp, only the water temp that goes to the heating system.

I looked the "calculation of the heat curve" program and it does exctly what i need, but  how can i control the 0-10V valve with it?

I think the valve has 0V = 0% and 10V=100% open

I also want to shut down the pump if the returning water from the system is hotter than the water that goes in. ( might happen on summer when its very hot)

thanks

I should be paused for maybe 2 hours and then turn on again?

And if the water is still too hot, it should be turned off again.

Does this make any sense?

Better ideas are always welcome :)

How do i give the comparison value to the PI controller?

edit: to the R connector i guess?

I think its working, at least its controlling the AQ1 ?

here's what i got so far. i know its a mess but i started working with this only yesterday, with zero experience...

boiler/burner control is kinda working, but if there is something wrong with it, please let me know?

still have few problems:

- i need overheat prevention function for AI4, if the temp reaches over setpoint (45c) it shuts off the Q3  and the closes the valve AQ1? 

I tried to use analog treshold trigger to make it work with no luck. The AND block works ok for the pump and the B020 A/M input, it shuts the pump and drives the AQ1 to 0.

-how can i build the analog comparator which compares AI4 (water IN temp) and AI5 (water OUT temp)

when the AI5 value is larger than AI4, i want the Q3(heating pump) off for 2hrs and then back on.

and it should be running for 15min without the comparator for temperatures in the piping to settle down..

I hope you understand what im trying to explain here, my english isnt that good 

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. 

Im sorry for the bit by bit posting, i didn't wanna open new thread for every question.

The temperature curve can be linear, those are just example temperatures.

I just need to edit the values.

The system has three parts now.

First part (upper part in the diagram) controls the burner and the tank etc for hot water. 

Second part (lower part in the diagram) control the floor heating system water.

Third part controls the lights (not important atm, just testing)