Local Historian Plug-In for KEPServerEX
The Local Historian Plug-In moves data collection, storage, and access closer to the data source to prevent data loss and improve operational efficiency via open access and a single product solution. By plugging into the KEPServerEX communications platform, the Local Historian can connect to any device and add devices in real-time without operational downtime. Its plug-in architecture simplifies configuration, provides flexibility, and makes the information accessible across OPC HDA (an open standard).
Local Historian Plug-In Manual (PDF) | |
Local Historian Plug-In Datasheet (PDF) |
Plug-In Driver Features:
- Collects data consisting of a value, quality, and timestamp from any data source in the server (such as drivers, plug-ins, or system tags)
- Collects from both static and dynamic server tags
- Supports persistence to a volume on the local machine (which can be a fixed drive or removable media)
- Supports access to historical data via OPC HDA 1.20
- Supports data timestamps with one millisecond resolution
- Supports configurable data collection scan rates as frequent as 10 milliseconds
- Supports collection deadband
- Has a configurable data retention policy
- Imports historical data that has been backed up and removed from active use
- Has a built-in historical data viewer for quick troubleshooting
- Supports tiered licensing for up to 10,000 tags
Supported Devices:
- All devices supported by KEPServerEX
Protocol:
- OPC HDA 1.20 client access
- Supported IOPCHDA_Server Interface Functions:
- GetAggregates
- GetHistorianStatus
- GetItemAttributes
- GetItemHandles
- ReleaseItemHandles
- ValidateItemIDs
- CreateBrowse (except filtering)
- Supported IOPCHDA_SyncRead Interface Functions:
- ReadAttribute
- ReadProcessed (AVERAGE only)
- ReadRaw
- *The supported ReadProcessed aggregate is AVERAGE.
- Supported IOPCHDA_Browser Interface Functions:
- GetEnum
- ChangeBrowsePosition
- GetItemID
- GetBranchPosition
- Supported IOPCHDA_Server Interface Functions: