Good day.

I am working on a project in TIA Portal V19 with the following hardware: CPU1512SP-1 and a Unified Basic HMI. The project also includes alarm monitoring. The HMI has a designated alarm screen with an "Alarm Control" element. Program alarms are implemented as BOOL variables, and I am using a DWORD tag called "ackStatus," where individual bits monitor the acknowledgment status.

The PLC must provide a digital output (DQ) signal to an external system, labeled as "Common Alarm." This signal should be active if there is any active or unacknowledged alarm on the HMI.

I can implement this functionality for program alarms by checking the bits of the "ackStatus" tag and the states of all BOOL variables. However, I am unsure how to handle this for system events, such as:

[536870921 "Computer1 (@2%s@): Service (@1%s@) is not being executed."]