I doubt many know this, but register 33 hold a Company Code. Why does the inverter need a company code? I have no idea.
Last year I was curious what it was for, so I changed it. To begin, it was set to 7. I changed it to 10, then 9 , then 8, then 7, ... and so on all the way down to 1.
This is what appeared in the log

Afterwards, I put it back to 7 just in case.
Sharing for info only just in case anyone finds it useful.



