"What is Sensing Mode" The box was unchecked
More background... I did understand that the device needs to be place in linking node to make changes. Here is another piece of info though... I can put the device into linking mode, look at the gui set option screen, make changes, press ok, and when I repeat the steps none of the changes I have made to the sensor are persisted. When I bring up the settings in the gui again they are lost.
For more background, I have two sensors and they exhibit the same behavior.
About using a program for the turn off logic. That seems to be a good idea. I thought of it but since I'm a novice, I wasn't sure the off timer would keep getting reset in ISY when motion was present. For instance, I would like the light to stay on indefinitely while there is motion and turn off after 3 minutes of inactivity. Will the sample code you provided do that?