OKUMA MC4VA OSP5000

Hello,
I have OKUMA MC4-VA with OSP5000 control and YASKAWA VARISPEED 626MT2B drive.
From couple of days I have a big problem:

when I tried to stop spindle it does not stop but slow down and rotate all the time 20-70rpm but not stable
MDI and RESET, STOP or ORIENTATION buttons does not work, Only way to stop spindle is turn controll off..

VIDEO: https://drive.google.com/open?id=1TK...0BnJLsKCmjqKjT

I have no idea where is the problem, can someone help me?
Thank you

congratulations / you finally achieved 100% spindle time :)

many shops have to work really hard to reach at least 70%, but voila, you did it like a charm

is easy to reach the top, but can you stay there ?



sorry defcom, i have no clue :)