An issue in the ProfiNET alarm management function block PNIOGETALARM sporadically caused the zenon Logic service process to terminate, e.g when unplugging a ProfiNET I/O sub-module. The process restarted automatically and communication was restored when the module was re-plugged.
The issue has been addressed and the behavior is now as expected. 

To benefit from this fix:

• Update your zenon Software Platform to the latest build of zenon 15 or higher.