Electric Underfloor heating - group addresses

[zeca]

hi,
first, please accept my apologies for not writing in German (this being a German forum), but my command of the German language isn't good enough to post here.

I have a KNX setup installed at home, with about 40 devices, configured in ETS5.
I'm having problems seting up the electric underfloor heating in ETS.

The electric (laminate) underfloor heating mats are just simple resistive loads (about 150W/m^2) with an on/off state, like say a (incandescent) light bulb.
Each mat is connected to an EIB switch actuator output.
Floor temperature for each mat is measured by a temperature sensor attached to a Gira 5142 touch sensor 3 Plus.

There is also a temperature sensor (PT100) connected to an ABB AE/S 4.2 analogue input and that area is to be controlled by a Merten MEG6241, instead of the Gira 5142.

I have defined the setpoint temperature in the Gira 5142 and MEG6241 and the heating type to switching 2-point with hysteresis of +5/-5K.

What I don't know how to do in ETS is create a group address which uses a Gira 5142 or MEG6421 output object to turn on/off the switch actuator channel to which a given mat is connected.
Ie which output object in the Gira 5142 and MEG6421 should be put in the group address to commute the switch actuator's channel?

Thanks in advance for any help you can provide.

cheers,
Zeca

[multimedia]

Hi Zeca,
i would configure the PWM for underfloor heating, with a cycle time of 20 to 30 minutes.
The regulation will be much more accurate than 2point regulation.
The (bit)output of the regulator may be directly connected to the group address of the switch actuator.
Cheers
christian