Toolkit showing no serial number and or display but disappears when toolkit scan is done. Unable to edit or program the unit.

If 5085edlt has the latest  firmware 1.6 and toolkit running is an earlier version than Toolkit V1.16.0 then you will have issues with programming them. Things expect are  i.e no serial number showing up on network scan or able to load up and program the unit..

advice to download and run C-Bus Toolkit 1.16.0 or later

please see link for C-Bus software: https://www.se.com/ww/en/download/

C-Bus Toolkit 1.6.0 https://download.schneider-electric.com/files?p_Archive_Name=C-Bus-Toolkit_V1160.zip&p_enDocType=Software - Release&p_Doc_Ref=C-Bus-Toolkit_V1160

Released for: Schneider Electric Australia