ATV312 Read Parameters via PKW-area

Good day to everyone!

I am trying to read parameters from ATV312 DP slave using PKW telegram. 

When reading multiple parameters from multiple ATV312 slaves I get all values periodically (but not cyclically) mixed up (as seen on trend attached to this topic).

First I used L-area to temporarily store data returned from slave before putting it into STAT-area.

Now I use FB call inside main FB (driver) to read each parameter (FB100>FB101), but the problem still persists. Please see attached source for details (FB100 > NW6-8 for FB101 calls).