Downtime graph is showing a flat line

Symptoms

• A Downtime Unit is showing a flat line graph.

Diagnosis

• A flat line on the graph means that there are not Timeseries data received from the Data Historian.

Solution

• Check that the Interface service is running, check the logs for any exceptions before attempting to start the service.
  • If it fails, check one of the following:
    • Licence is valid
    • Database connection string is correct
    • Data Historian connection details is correct.
      • Specifically, check for:
        • • Server name 
          • Username 
          • Password
      • Use the Test Connection to validate Data Historian connection details.

• Verify that the Tag is correct.
  • Check the last data received for the Tag