Comment Retrieval Mode

The Comment Retrieval Mode returns any comments or annotations that have been stored with the data between the start time and end time of the query.

However, some Sampling and Calculation modes use raw samples beyond the start and end time. time to interpolate a value. An average will interpolate a value at the start of each interval and this will likely use raw samples outside the interval.

To retrieve the comments from raw values that were used beyond the interval, you can define a registry key on a computer running the Data Archiver.

Create a DWORD value under:

HKEY_LOCAL_MACHINE\Software\Intellution, Inc.\iHistorian\Services\DataArchiver

• If you have the Data Archiver installed, the registry key should already exist and you are just adding a DWORD value.
• Set CommentRetrievalMode to 1.