LM5 and KNX integration - how should you work with programming

[Daniel]

If you already have group in ETS which you want to control from elsewhere then you directly select this group. In example for modbus and a KNX switch. In ETS you have a switch with address 1/1/1 and you have modbus device which you want to control this object (I assume the data conversion is correct) then in modbus mapper you just select group 1./1/1 for the register you want to control it from. If the modbus data needs a conversion of some sort, let say you have byte object and you want to write it to bit, then you need a script to convert it. In such case modbus value would be written to another group address ( I would recommend to use virtual group to not collide with ETS) and then you need a script to convert the values and write to KNX object. As you are a beginner I would recommend you to use Scenes tab and in there you can make basic conversion. This way you don't have to use the script.