I’ve been sitting on this for awhile awaiting more details from Jasco. But the rep that shared the info initially with me seems to have fallen off the face of the Earth.
I won’t bore you with details, but this is basically all you need to know.
Confirmed in firmware 5.26+
Param16: Switch Mode
0 = full range dimmer
1 = standard on/off switch (no ramping)
Param20: Minimum Dim Level
0 to 99
Can be overridden by a Zwave command directly setting the level.
I made simple edits to the nuttytree handler to incorporate these and have been using on a number of devices for 2 months. Feel free to use as you see fit!
I’ll share my DH if anyone needs.