Hi there

Finally the cure has been found! The trouble was really in network adapter drivers, as some guys in this conference mentioned! Let me explain my issue in details.

In my case all PCs which were in my tests, had operation systems installed with default drivers. So it were pure operation system installaions - "from box" with no additional magic at all. And because of russian localisation ethernet network adapter had cyrillic symbols in it's name indicated in Device manager (see attachment). Once I had my driver updated so that the ethernet adapter's name in Device Manager was only in english and didn't contain any cyrillic or other suspicious symbols - all troubles in communicating with LOGO! were gone totally!

This trick works also fine on virtual systems. In this case you must ensure that there is no non-english symbols in adapter's name as for virtual system and for host system.

Hallo kostache,

thanks for your nice feedback.

Yes, it is.

Why do you ask?

Hello kostache,

thanks for this information 

 I search about 8 hours, Ip adress; cable, computer....

And it is the driver with cyrillic chars

I Downlod a version, for the computer ther is no new version bur i download it and install, and it work

Bests regards for your information