Issue:
What can cause ILF fault on ATV320 Drive?

Product Line:
ATV320

Environment:
All

Cause:
NA

Resolution:
ILF fault is communication interruption between the option card and the drive. The first test will be to replace impacted option cards by known good cards to know if ILF fault follows the option card or the drive.
For example, swap impacted option cards with option cards where ATV320 drives are working fine.  

If ILF fault is caused by option cards, replace them. 

If you still have ILF fault despite the option card replacement, network overload may be the cause.