800xA System Identifier
what is 800xA System Identifier license? when do we use this license?
and when do we use License dongle for USB Port?
The subject of Licensing is fully explained in the manual, "2PAA111691-600_C_en_System_800xA_6.0_Licensing_Information.pdf", which is available either in your runtime system or it is available on the MCS, (MyControlSystem), web site via a valid Sentinel ID entry. Should you have issues with either of these methods, you can open a Support Case with your local RAC, (Regional Action Center), and they will assist in obtaining this information.
The typical location where documentation is installed on your runtime system is in the Aspect Server in the following directory:
C:\Program Files (x86)\Common Files\ABB Industrial IT\800xA\System\Documentation\User Instructions\System\Reference