1. Open the OS Station:

   • Open the desired SIMATIC PCS 7 OS station through the WinCC Explorer on the Engineering Station.

2. Access the Horn Editor:

   • Open the Horn Editor by double-clicking the horn icon in the WinCC Explorer.

3. Configure Message Classes:

   • In the Horn Editor, configure and select the message classes that will trigger the horn.

4. Set Message Priority:

   • Select the message priority for the messages that will activate the horn.

5. Define Signal Tags:

   • Define the trigger authorization of the signal tags that will be used to activate the horn.

6. Assign Signal Transmitters:

   • Assign signal transmitters to the signal tags.

7. Configure Horn Acknowledgment:

   • Configure the horn acknowledgment behavior to determine how the horn will be acknowledged once triggered.

8. Completion:

   • Review all configurations and ensure everything is set up correctly.

https://support.industry.siemens.com/cs/us/en/view/89279751