Thanks for the reply. When you say "In the ISY Portal you have to specify what analogue value is considered an MS 'On' for the Alexa app" I assume you mean specify the corresponding integer value in the "Motion Detected Value" box in the Portal. I did do that. There are four variables set up 1,2,3,4 which generated four motion sensors in Alexa each of which has their own triggered routine tied to it that work fine. Yes, they are state variables. Should have used that convention.