[DC-braking not working on a VFD UMI-022BE-B1]

I am using a UMI-022BE-B1 controled through modbus to lift trash bins (on a truck)

My problem is that when I am lifting a load and stop the machine fall back around 15 cm before stoping (see picture)

I used to run the same machine with Omron inverters there I set the Injector DC-Breaking to stop and hold the load while the mecanical break took hold.
But I am gettin the feeling that the Unitronics DC-Braking setting are mostly cosmetic since no matter how I play with them nothing happens.
I tried using P013. Short Circut breaking. Both at 75% and 100% power for 3 second and the only thing that happens is that there is no breaking for 3 seconds.

I have break resistors connected  and have Energy breaking set (P08.37) but I have also tried turning that offf.

Does anyone have any experience in tuning the breaking on these inverters? Is there something that I might be missing that turns of DC-breaking and Short-Circut breaking?

 

 

[VFD Run frequency Mode Returns -4]

I am using a  USC-B5-R38 to run two inverters UMI-022BE-B1

most of the time I try to start them running with "VFD Run frequency Mode" the output code becomes -4 (goes through 2 before)

The VFDs are active, Enable communication is on
vfd is connected = 1
Enable periodic status Read = 1
I can download and upload profiles but trying to get the inverters running nearly always gives me error nr -4 "Communication timeout exceeded" .

(mod edited out your email address, Daniel)