The screen might load, but your trend views are empty, your alarm logs are silent, and that sinking feeling in your stomach sets in. You have a license—so why is the system refusing to work?
Ensure that logging is actually required. If you are not logging data, check your HMI screens to ensure you aren't trying to open a trend view that requires historical data. 4. Special Case: HMI Panels vs. IPCs Licensing rules differ slightly based on hardware:
If your project was originally created for a Comfort/TP Panel and is now running on a PC: The screen might load, but your trend views
Open the on the engineering station or the target PC/IPC. Check the "License key" column.
Unlike the hardware-based SIMATIC Comfort Panels (which include basic logging and recipe functionalities in their base price), the PC-based . The basic Runtime license only allows you to run the visualization. If you want to perform historical trending, alarm logging, or data archiving, you must purchase an additional license. If you are not logging data, check your
Follow this systematic approach to resolve the error.
Before attempting to fix the issue, identify the root cause: A. Missing "Logging" License IPCs Licensing rules differ slightly based on hardware:
. If the PC was shut down improperly, the license may be marked as Disable Unused Options : If you do not actually need , you must remove all archive tags alarm logs