ABB COM600 series Data Historian Operator's Manual page 95

1MRS756739 COM600 series, Version 5.0
Data Historian Operator's Manual
Click Recalculate on the menu to open the History recalculation activation dialog:
Figure 5.7.4-2 The History recalculation activation dialog
• Select the history table from where (selected table included) the recollection is
activated. If a variable was selected in the legend when you clicked Activate
Recollection..., the source table for the past specified for that variable is shown as
the default table. Depending on the RTDB definitions, the recollection may be
cumulated to all higher level history tables.
• Click OK to activate the recollection or Cancel to cancel.
The recollection may take a while. RTDB has a diagnostic variable
RTDB_HRQUEUELENGTH that indicates the length of the current recollection queue.
When its value reaches zero, the recollection is ready (however, if other recollection
requests are constantly being done, the value may never reach zero). The execution and
completion of the recollection tasks can also be monitored through the MessageLog
messages from the RTDB-Scheduler.
HistoryRecalculationActivation.jpg
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