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Slave devices and ID's



Hi all,


Before I started this topic, I seached various forums and the internet with Google. The answer is not clear to me, hopefully someone knows.

When I added a new Fibaro FGS222 Switch 2x1,5kW EU in HC2, I see a master/slave overview like this:




ID 100 (Icon is a box, not a switch like the others)



ID 101 (Named "Lamp 1")

ID 102 (Automatically called "100.1")

ID 103 (Named "Lamp 2")



Does anyone know what the purpose is of the slave device with swich icon and ID 102?



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There was a time, when Z-Wave devices could only have one function. When "multi" devices appeared, like double relays, Z-Wave had to find a mechanism to expose new functionality without breaking compatibility. For compatibility with older controllers and Z-Wave devices, they decided to offer two interfaces (often called "single" and "multi" instance). The old interface is a duplicate of a function of the new one. In case of a double relay, it is most likely the first relay. So you get three slaves...


If you go to associations, you will find two columns: S for single and M for multi. If you want to control the second relay, both devices have to support M.


By "old" I mean Z-Wave version... I'd say you have to go back several years to find devices that do not support M but they still exist.


Does this help?

Edited by petergebruers
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I realize this is an old thread, but i agree. This is utterly confusing. Found another similar thread also, but not answering this question. I get there is something called master/slave, but why create extra devices?


I do not know what to do with the other devices that are generated? They have to be hidden and makes a lot of clutter. 

So.... bump.

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