Hello,

I had a 2476ST go bad and replaced it with a 2477S. When trying to add a new insteon device the ISY Admin Console says "Cannot determine Insteon engine"

It is a larger system and was in a remote building so I un-installed it and wired it into the plug next to the PLM. Same result.

So I tried another new 2477S I had, in both places, same result.

So, just for fun I tried a third new switch, 2477S, I had, this time only hardwired next to the PLM, still same result.

The last switch in the test series was a 2477S Rev 7.0

My ISY is 5.3.4

My system has multiple other 2477S switches, never had an issue.

Help.

I would try the alternative add method:

• Wire one of the new switches up

• From the linking menu, put iox in linking mode

• Press the set button

• You should see iox recognize it and press finish

That’s method I always use to add.

Update. The above method did not work for the installed switch (found the switch but could not identify the engine) but did work for the second switch.

FYI, Across 2 systems at 2 locations (100's of switches and devices) since the beginning of Insteon/ISY I have never had to do this. I started with X-10 in the 1980's.

A next step will be to capture what's going on with the Event Viewer.

• Get the switch wired up to test

• In iox - Tools/Diagnostics/Event viewer

• In the event viewer window at the bottom, set for level 3

• With the event window open, go to the linking menu and repeat the steps for either method of adding the switch

• Saved the results and post it back here

We have folks here that are experienced translating those logs into English and hopefully one of them will chime in

Edited 1 hour ago1 hr by paulbates