ABB ACS580MV Commissioning Manual page 51

Standard Commissioning Process 51
Copy the IMPACT path from the properties of program. Such as
'C:\xilinx\14.7\LabTools\LabTools\bin\nt64\'.
Open the System variables by the path: Start -> Settings -> Control panel -> System
and Security -> System -> Advanced system settings -> Environment variables.
Add to the value of "Path" in system variables the location of IMPACT.exe as value.
This needs to be done only once.