Hello friends

I have an OKUMA VAC II D-11 spindle inverter on lathe LB 9.

When I gona stop it from 1500rpm and above, it goes in alarm :M1(flash) +M2(flash) +led 8 = IOCS
(Short of inverter bridge).
Not every time (sometimes very often, sometimes more rarely.... ).

It's gives that alarm when I stop it nevertheless of Direction (in the two directions, nevertheless M3 or M4) .

So I think the problems are with regenerative circuit.

Could you please, give me some hint, may be it will help if I could decrease acceleration/ deceleration.

If you can give me some advise, could I do that?

Maybe some of jumpers (SW) or variable resistors (VR) ?

Best regards: Jeck