[Solved] Need help setting up KNX Climate with MDT AKH-0800.02

[Bouni]

Hi,

I run my KNX setup now for almost 10 years without any issues.
When I started, I chose the Loxone Miniserver Gen1 because it was kind of cheap and provided a KNX Interface that could be also used as a IP Interface.
Relatively quickly I replaced the Loxone Miniserver with Home Assistant and just used it as IP Interface.
The only thing that remained was the climate / heating control which was done by the Miniserver.

Now I decided to get rid of it and installed a Weinzierl KNX IP Interface 731.

That also meant reconfiguring the MDT AKH-0800.02 that I use to internal control.

I tried several blog posts/forum posts I’ve found but it does not fully work.

This is my config for one KNX climate entity

- name: "Büro"
  temperature_address: "4/2/60"
  setpoint_shift_address: "4/1/60"
  setpoint_shift_state_address: "4/3/60"
  setpoint_shift_mode: "DPT9002"
  target_temperature_state_address: "4/4/60"
  min_temp: 16.0
  max_temp: 28.0
  temperature_step: 0.5
  operation_mode_frost_protection_address: "4/5/60"
  operation_mode_night_address: "4/6/60"
  operation_mode_comfort_address: "4/7/60"
  operation_mode_state_address: "4/0/60"

These are the settings I did in ETS

When I change the Temperature in HA, it jumps back to the previous 21°C after a few seconds.

In the KNX Group monitor I see that a setpoint shift is sent

Any ideas why this happens?

[richardpolzer]

Hi,

after looking at your config there are a few issues.

@Bouni

- name: "Büro"
  temperature_address: "4/2/60"
  setpoint_shift_address: "4/1/60"
  setpoint_shift_state_address: "4/3/60"
  setpoint_shift_mode: "DPT9002"
  target_temperature_state_address: "4/4/60"
  min_temp: 16.0
  max_temp: 28.0
  temperature_step: 0.5
  operation_mode_frost_protection_address: "4/5/60"
  operation_mode_night_address: "4/6/60"
  operation_mode_comfort_address: "4/7/60"
  operation_mode_state_address: "4/0/60"

You set the target temperature and the setpoint_shift_state_address to the same address. This can’t be right. In fact in your ETS you labeled a few addresses wrong. Number 7 is the temperature of your setting comfort not the target temperature of your thermostat. Number 9 is the target temperature of your thermostat. Currently i do not see a setpoint_shift_state_address exposed in your ETS. I also don’t see the setting for it in the parameters.

I have the AKH-0800.03 and it has a setting for that. You might be able to update the application or firmware to get it.

I also saw that in the ETS you set it as heating and cooling while in HA its set to heating only.

That would be the correct parameter configuration for what you are wanting to accomplish

[Bouni]

I’ve made a mistake, I added the wrong screenshot. Here is the correct one

I also tried to do a firmware update, but failed to install the App in ETS5, I don’t know how to activate the app, it says unlicenced and I see no licence on myknx.org anywhere …

[farmio (Matthias Alphart)]

Hi !
Have a look at KNX Climate heating actuator MDT
TLDR: you’ll have to set a read flag for setpoint shift with this model. I don’t think it supports firmware updates.

[Bouni]

I was able to get everything up and running due to @richardpolzer 's awesome support.

Here are my settings in ETS

As @farmio mentioned, the read flag for the setpoint shift is crucial

And my Home Assistant settings. I decided to use the UI to configure the climate entities because, why not.