Hi guys,
thank you for help here...
yes, I use 115,000 from the beginning. Powering down unit and leaving it without battery whole night didn't help. Unit started in the morning with all data inside, including application I downloaded last before "problems". Good hardware :-)
Well, support gave me 9.0.1 beta which behaved same as 8.6.3 and 9.0.0beta. No progress.
Powering up in bootstrap mode (hold 5sec after powerup and taping twice to stop initialization) also gave me no results.
I even took another PC to check if PC is the problem...same thing.
Then I installed v8.0.1 and put older OS for v570 into the unit.
After that, 8.0.1. was able to "download" application to PLC. :-)
I installed 9.0.1 again and upgraded OS only through advanced menu. It worked! New OS 3.3 (03) was installed ok and unit reported it correctly during application download.
But I wanted also to upgrade BinLib and Boot file....(through advanced mode)
Here I noticed that I loose serial communication BEFORE BOOT or BINLIB system files are erased ("erasing" progress bar remains empty and PLC shows "Idle" on the screen)...PC reports loose of communications.
Only when I choose O/S file to be downloaded, erasing bar works, plc changes from Idle to Erasing and Programming etc. New O/S is installed correctly and download of application works again.
Well, I'm still not happy because if I go to PC communication...O/S check...VisiLogic opens upgrade dialog and wants to upgrade BOOT, BinLib and OS to latest versions (newer than currently in PLC)...but when I start (4 steps) wizzard, it starts erasing O/S system files and serial communication breaks when O/S erasing bar reaches the end.
Powering down/up PLC results with "O/S error" but then using Advanced mode I download only O/S file and restore the unit to working condition.
Same thing happens on both my PC and laptop so I don't think is specific PC related issue.
At least I manage to avoid reporting 0.(0) version at beginning of application download.
If you know a way you can upgrade BOOT and BinLib files without communication break, it would make me happy :-)
Thank you again for helping me along this problem
Regards
Marko