fix: return 0 if ring current device is not accessible

src/aare/devices/bec_worker.py

@@ -9,6 +9,7 @@ from aarecommon.errors.exception_handler import BECCommunicationError
 from aarecommon.models.beamline import MXBeamline
 from bec_ipython_client import BECIPythonClient
 from bec_ipython_client.signals import OperationMode
+from bec_lib.device import RPCError, ScanRequestError
 from bec_lib.procedures.helper import FrontendProcedureHelper
 from bec_lib.service_config import ServiceConfig
 
@@ -527,7 +528,11 @@ class BECClientWorker:
 
     @property
     def ring_current(self) -> float:
-        return self._ring_current.get()
+        try:
+            return self._ring_current.get()
+        except (RPCError, ScanRequestError) as e:
+            logger.warning(f"Ring current BEC device is not available: {e}")
+            return 0
 
 
 if __name__ == "__main__":