Hello,

In my WinCC Unified Comfort Panel project, I’m trying to use a Web Control to open some local files (specifically .pdf and .html files). My goal is to display a local PDF file inside the Web Control.

Here is the situation:

• When I enter the following URL in the browser, it works successfully:

  https://desktop-es4mel4/WebRH 

  This URL loads the WebRH directory on the panel without issues.

• However, when I try to access individual files, I receive a 404 - Page Not Found error:

  https://desktop-es4mel4/WebRH/16008122018.pdf https://desktop-es4mel4/WebRH/test.html

  These files do exist in the corresponding directory:
  C:\Program Files\Siemens\Automation\WinCCUnified\WebRH\,
  but they cannot be accessed via URL.

What I’ve tried:

• Manually copied the files into the WebRH and subdirectories.
• Tried using the same URLs within the Web Control element.
• From a browser, only the base WebRH directory is accessible — accessing specific files under it results in 404 errors.

My Question:

Is it possible to access .pdf or .html files via the WebRH path in WinCC Unified?
If yes, where should these files be placed, or how should they be referenced?

Any suggestions or solutions are highly appreciated.
Thank you!

Hello Stefan,

Thank you for your detailed explanation.

My goal is to embed a PDF file in one Web Control and a 3D model in another within the WinCC Unified Comfort Panel project. For this, I need these files to be accessible on the panel itself.

Therefore, if I embed these files directly into the project (e.g., as media or resources), I need a way to open and display them properly on the panel at runtime.

I found two videos showing that 3D models and other interactive content can indeed be displayed inside a Web Control using HTTPS-based paths:

• https://www.youtube.com/watch?v=kublRiAQnao
• https://www.youtube.com/watch?v=vij5kT8yQyg&list=PLG_Bzo3yink9OIzYIrw82ky9trIS3m5vz&index=13

This proves that embedding and accessing such content (3D, PDFs, etc.) in the Unified Panel runtime is technically possible, at least under certain conditions.

Could you please advise on the correct method to include and access such files (PDF, 3D models) locally within the panel project, and how to make them work reliably inside Web Control?

Thanks in advance!

Hi Stefan,

Could you please explain how to properly add and display a PDF file in a WinCC Unified project? I am using tiaport v20.

Kind regards,
Akif