Hello,

I have a problem very similar to the one described here: https://support.industry.siemens.com/forum/WW/en/posts/wincc-fullscreen-on-monitor-1-only-in-a-dual-monitor-setup/65949

I use TIA portal V17, WinCC prof. Everything works fine when only one monitor is connected to the PC. If more monitors are connected, RT starts on all monitors (there is actual process screens on one monitor and gray, unused space on second monitor). If I uncheck option "Full Screen" in Windows Behavior in RT Runtime settings, winCC runtime starts with relatively small windows, but in that case some screens are not shown at all. 

I have uncheck all fields under "Disable functions" (except Alt-F4), but  that doesn't help at all.

The resolution is 1920x1080. The only solution so far is to change disconnect other monitor or to choose option "Show only on 1" in windows.

So, I have two problems:

- how to make RT starts with size that corresponds to resolution 1920x108 by default when Full Screen is unchecked

- how to troubleshoot why actual screen is not shown at all if RT starts in smaller window (when full screen is unchecked).

Is there any other place with runtime settings or .ini file where further adjustments can be made?

Attached is a screenshot with runtime settings. As soon as I check "Full Screen" option, process screen is shown. 

The WinCC project under TIA is made by somebody else and even if choose to enable options like maximize, minimize etc, there are not buttons showed to minimize and maximize. Many parts of the visualization are generated by SiVarc.

Can you give any advice, what to inspect further?

Thank you.

Hi Pandiani,

I think the following FAQ will help you to program several screens in Professional:

How do you use multiple monitors simultaneously with the WinCC (TIA Portal) Runtime Professional?