Indigo Domotics

No, from your description it sounds just like that is behavior of how it works.

Why would a DEVICE>OFF command stop the siren immediately, and a POWERLINC>OFF take 20 seconds? I have always found that POWERLINC commands are the speediest and most reliable.

You would have to ask Smarthome. They are different commands. From your description it sounds like the command is sent immediately, then the siren has a delay before it turns OFF. I don't know why they would implement it like that, but it isn't Indigo asking for the delay.

Have you tried sending "Scene Instant Off" instead of "Scene Off"? Maybe that will avoid the delay.

INSTANT OFF much better, maybe 2-3 seconds

Thanks

Matt your solution worked for me too, thanks!!