Table 24 defines the ReadAnnotationDataDetails structure.

Table 24 – ReadAnnotaionDataDetails






Specifies the details used to perform an “at time” history read.

reqTimes []


The entries define the specific timestamps for which values are to be read.

The ReadAnnotationDataDetails structure reads the Annotaion Data from the history database for the specified timestamps for one or more HistoricalDataNodes .

The order of the Annotations Data returned shall match the order of the timestamps supplied in the request.

If Annotation Data is not supported for a HistoricalDataNode then the StatusCode shall be Bad_HistoryOperationUnsupported.

If the read request is taking a long time to calculate then the Server may return zero results with a ContinuationPoint that allows the Server to resume the calculation on the next Client HistoryRead call.