The topic format for alarms metadata is as follows:
ie/m/j/simatic/v1/s7c1/ev
where ie: industrial edge, m: metadata, j: json, s7c1: SIMATIC S7 Connector instance 1, ev: event.
The JSON structure for alarms metadata is as follows:
NOTE
Alarms metadata is published only when you deploy S7 Connection with 'Full Text Alarm' checkbox enabled before starting the project.
Once you start the Industrial Edge Runtime, you cannot configure 'Full Text Alarms' checkbox. Therefore, the alarms metadata is not published in this case.