Temperature measurement

Hi,

I want to make a little heat controller for my workshop.

I've read a lot about LOGO's and temp. measurement. It looks like i would need an expansionmodule to read a PT100.

However, PT100 have a large temperaturespan, which i don't need. (It will measure room temperature)

I stumbled across Siemens QAA2061, which is a 0-50 C @ 0-10V, which i suppose my LOGO 8 would read? 

Datasheet here; Siemens QAA2061

Questions;

Can I use this sensor with a LOGO8, reading it on an analog input?

Can I "translate" the values to temperature some way, ie. to get a reading on a TDE?

Can I make temp up and down in 0,5C increments using buttons on digital inputs. And further have a button to set a pre-defined night economy mode?

Thanks in advance.

Thanks a lot for a quick reply.

How would i scale the 0-10V input to temperature on the display. I was not able to find that kind of function in LOGO Comfort. I think I need to write a lookup table or similar?

I've got an 6ED1052-2MD00-0BA8 + TDE! + 24V 4A PSU.

A further question the datasheet doesn't answer 100% directly. May i switch 230 VAC on the 24V LOGO! (It is the relay out version)
 

Thanks a lot mate.

Would B012 read 0-5V instead of 0-10V (max value 5000)?. Or do I don't understand the analog inputs.

B009, what does it control? It seems like B008 is what defines the setpoint?

Would really like to understand why it is designed like you did, it will help me edit and create new programs better.

Toogling the reset-pin on B008 could set a night-economy mode at ie. 16C. But i'll have to manually rev the temperature up again. I could not find a way to set ie 16C and 20C switching with a button/DI

EDIT: Is it possible to edit temperature in 0,1C instead of 0,01C? It takes a hell of a time go go from 16 to 20C :)

Thanks for the explanation.

I actually have a 4-20 mA sensor on hand, so I can test the setup, until i order the QAA2061. Can I just flip B012 to 4-20 mA, or would that require more scaling?

As there's only four inputs, and I have to use one for the tempsensor, i have moved temp setting to F1, F2, F3 and F4 of the TDE. Any problems with that?

EDIT: I just saw your new post, as i had posted.

Where did you edit the temp increment to 0,1C? Can't easilly spot the difference from V2 to V3.

You have added connections from I3 to B020 i see. I had figured that out in V2. It'll only raise or lower the temperature, if holded for 1 second or longer. :)

Great forum you have on here.