Historian
The Historian is a built-in feature that requires no additional setup.
The Historian offers two separate data stores:
- Data Historian: where you can store the value of data point tags historically.
- Event Log: where an audit of events is stored.
Data Historian
To store a Data Point Tag historically, just go to the tag configuration properties and set HistoricEnable to True:
As soon as you have enabled historical storage, Fernhill SCADA starts recording the data in the Data Historian.
Additional properties allow you to set up:
- Significant change deadband
- Sample Interval
- Number of samples stored
The Trend Display allows you to view historical data in the Data Historian:
You can also access historical data point tag data from:
- The Show Historical Data option in the configuration tool Tag Window Menu
- A Text Report Tag.
- 3rd party OPC UA applications using the OPC UA server
- 3rd party OPC classic applications using the OPC Classic Historical Data Access server
- 3rd party ODBC applications using the ODBC Driver.
For more information see Data Historian in the online help.
Event Log
Viewing the Event Log:
Three types of event are recorded in the event log:
- Tracking: An event directly caused by an operator action
- Condition: An event related to a change in state of an alarm condition
- Simple: All other events not related to an operator action or alarm condition
You can access the Event Log from:
- The Show Events option in the configuration tool Tag Window Menu
- The view menu in the Fernhill SCADA Notification Icon.
- 3rd party OPC aware applications using the OPC Alarm and Event server
- 3rd party ODBC aware applications using the ODBC Driver.
For more information see Event Log in the online help.