SMI motors

[fma]

Hi!

Sorry to write in english, but I think I will only find answers to my question on your forum...

I have to replace a Warema SMI motor (DunkerMotoren, in fact) which fried after a thunderbolt near my house. The motor does not communicate anymore with the KNX ABB module. I opened the motor, and had a look at the electronic board, but didn't find anything obvious; I replaced the opto-couplers, without success. The micro-controller probably died. The motor itself is OK (I was able to make it turn by sending 24VDC).

My question is: once the motor is replaced, do I have to buy the specific cable from Warema to set the new endstops positions? Is it really a specific cable? Or is it something I can build myself? I don't know if the cable really send commands on the SMI bus, or if it is something much simpler... I already build a manual cable, in order to move the blinds before I connect them to my KNX installation (it just connect SMI lines to 230V, to move up or down), and I can modify it.

Is it something specific to each SMI brand, or is it universal?

Thanks for your help!

Frédéric

[fma]

No idea?

[bezel]

Hi Frédéric,

SMI means "Standard Motor Interface" so I guess it should work.

I can't tell you someting about the cable you asked. But I read in another Tread, that the first Programming of the End-Positions is made by moving the blinds to the Ends for aprix 2 Minutes.
Maybe the Manual of the Motors has a explanation inside?

Sincerely
Björn

[fma]

Thanks for the answer.
Can you point me to the thread your are refering?
There is not much documentation from Warema; but there programming cable as a specific button to set the endstops...

[chaccount]

The cable is just putting 230V on SMI+ or SMI-. Never do that while other motors or an SMI interface with it's 24v is connected. You can move SMI motors and programm the end position using only 230V

[fma]

Yes, connecting SMI+ to 230V moves blind up, and connecting SMI- to 230V moves blind down. But how do I set the endstop? The Warema cable seems to have an additionnal button to do that, but I don't know what it does... Is it a sequence? Or just connecting both SMI+/SMI- to 230V at the same time? They give the procedure to set enstop, by moving 100mm before endstop, then hit prog. button, then move up again, then down (don't remember exactly).

BTW, I'm not using SMI-Lovo; all is working in 230VAC...

[chaccount]

I'm 99.9% sure it connects both at the same time. The only special thing about SMI regarding setting the end stop and these programming cables is that brown is always connected to 230V (normal shutters don't have the brown cable). A guy from Warema borrowed me the programming cable once and it does not have any special electronics etc.

[fma]

I would like to be sure at 100%, to avoid frying the motor...

[chaccount]

I am 100% sure that the end position was not set by SMI commands and that the programming cable did not have any electronic inside, it was just buttons. I would not be afraid to put 230V on SMI+ and SMI- at the same time. Because SMI commands are using 24V on SMI+ and SMI- anyway, the only thing the intelligent motor can do with 230V on SMI+ and/or SMI- is to detect that it is there. Why would it fry if both carry 230V. So don't worry

[fma]

Ok, thanks!

[fma]

Hi!

Just to confirm that it works! No need to buy an expensive cable to do that

Thanks again!