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Asked:20 Oct 2025

SIMATIC WinCC: Speed Low

Everytime when I start the WINCC it takes me several minutes. I want to know what can cause the low speed of the program?

#sosflex #SIMATIC WinCC #siemens
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Siemens Test Added an Answer on20 Oct 2025

WINCC Startup Time Optimization

Slow WINCC startup times can stem from several factors. Here's a breakdown of potential causes and solutions:

  • Large Project Size: Extensive projects with numerous screens, variables, and complex scripts naturally take longer to load.
  • Graphics Complexity: High-resolution images, animations, and complex graphic objects significantly impact load times. Optimize images and minimize animations.
  • Communication Connections: Numerous or slow-responding PLC/device connections during startup can cause delays. Verify network connectivity & optimize communication settings.
  • Historical Data Loading: Loading large archives during startup can be time-consuming. Configure archive loading options appropriately.
  • Font Loading: Many custom fonts or fonts not readily available can increase startup time.
  • Hardware Resources: Insufficient CPU, RAM, or slow storage (HDD instead of SSD) on the runtime computer will cause delays.

Recommendations:

  • Optimize Graphics: Reduce image sizes, use optimized graphic formats, and minimize animations.
  • Review Communication: Check and optimize PLC/device connections.
  • Archive Configuration: Adjust archive loading settings.
  • Hardware Upgrade: Consider upgrading hardware if resources are limited.

For detailed troubleshooting steps and specific recommendations, please refer to the following SiePortal knowledge base article: WINCC Runtime Startup is Slow

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