USS comm between MM440 and 224XP

Hi there,
I want to read the MM440 current and display it on HMI
Iam using the PLC 224XP and USS protocol.
Iam able to start/stop and change the speed of the drive through USS_CTRL block.
The setting of P2012(PZD length)=2,and P2013(PKW length)=127, as mentioned in the help file of Microwin.

*Now will the drive current can be configured in Drive to read it in PZD2?
Moment i change either the value of PZD or PKW other then the default values, i get drive error from USS_CTRL or speed which i'am feeding simply refues to reach drive!
Looking forward for suggestions
Manmeet

Here is a link to some S7-200 programming tips and examples. Tip 65 and 28 might be particularly helpful with USS. I have not used them, so I cannot comment on their value. I came across them while looking for help using USS with an S7-300 and MM420. Perhaps you may find a use for them. S7-200 Programming Tips (Entry ID 1232912)