Historian
The Historian is a built-in feature of Fernhill SCADA. The Historian is available and ready to use as soon as you have installed Fernhill SCADA. There is no additional software to load, or setup required.
The Historian offers two separate data stores:
- Historic Data - Where you can store the value of any data point tag historically.
- Event Log - Where an audit of user actions is stored.
Historic Data
To store a Data Point Tag historically you just go to the tag configuration properties and set HistoricEnable to True:
As soon as you have enabled historic storage, Fernhill SCADA starts recording the data in the Historian.
Additional properties allow you to setup:
- Significant change deadband,
- Sample Interval,
- Number of samples stored.
The Trend Display allows you to view historic data in the historian:
You can also access historic data point tag data from:
- The Show Historic Data option in the configuration tool Tag Window Menu
- A Text Report Tag.
- 3rd party OPC aware applications using the OPC Historic Data Access server
- 3rd party ADO.NET aware applications using the ADO.NET Data Provider.
- 3rd party ODBC aware applications using the ODBC Driver.
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 ADO.NET aware applications using the ADO.NET Data Provider.
- 3rd party ODBC aware applications using the ODBC Driver.