A few days ago I easily linked a Hidden Door Sensor. I deleted it as a device and updated my firmware to 4.2.10. Now, when I press the set button I get the 3 beeps and the light turns green but no device appears. I have factory reset the device several times, positioned the device near the PLM, near other dual-band devices and tried to relink. Nothing! Anyone know what is going on?

Set the Event Viewer at Level 3, try the linking again, and post the trace here.

I found the answer by researching the forum:

Place the Door Sensor in linking mode.

Select Link Management in the Admin Console.

Select New Insteon Device.

Type in the Device's Insteon Address.

Type in a name for the device.

Select Auto Discover.

Select Remove Exiting Links.

This will install the device and 3 nodes that will be self-explanatory.

 

The reason I ran into problems is that when I initailly linked the device I did so with an earlier version of the ISY firmware. That version did not support the nodes. When I upgraded firmware to a version that supported the nodes apparently that "confused" the device and I had to do the above workaround.

 

If only these devices were PNP!

That's one of the standard ways to link.   How were you doing it before?

Were you not going into linking mode in the ISY? 

The standard way where ISY discovers the device when it is placed in linking mode. That would not work in this case. I had to use the procedure above.