Question: How can I calculate a historic tag’s average inside a start/end date/time range? Solução: To do so, use Average function. Average (src, type, startTime [, endTime]) This function returns…
Question: How large is an Elipse SCADA’s historic file (*.dat)? Solution: Elipse SCADA’s historic files are no larger than 2GB. Their records’ limit, even when the configured value is high,…
Question: How can I calculate how much space a historic file will occupy in the hard disk? Solution: To do so, consider this: File header: 24 bytes. For each field,…
Question: How can I delete records from a historic? Solution: To do so, use the ClearHistoricalData() function of the desired historic (via scripts). If there is any object using the…
Question: Can I insert a record in the middle of a historic? Solution: Yes. To do so, create a temporary historic, and then create a script that executes the following…
Application that uses a historic as a database, where data can be altered via browser. Attachments: editrecordEN.zip
Application that illustrates how to delete records from a batch. Attachments: batch_EN.zip
Autor
Renan de Rossi
This application shows how batch historics, that is, historics that enable indexing a series of records to another record, work. The historic only starts recording data when a batch starts.…
This application queries a historic file and shows the total values from the data requested. Attachments: HistEN.zip