Hello !

Please, take a look here. May be U have some ideas, cause it can touch the STEP7 too.

https://support.industry.siemens.com/tf/ww/en/posts/a-very-strange-behavior-of-scada-system/184174/?page=0&pageSize=10#post737171

Closed cause question posted twice.

The second thread with the subject A very strange behavior of SCADA-system ! is published within the conference SIMATIC WinCC.

Best regards
Jen_Moderator