Store/Forward State

Associated with: Wonderware Historian.

The Store/Forward State attribute indicates the status of the HCAL store-and-forward cache.

The possible store-and-forward cache states are as follows:

• Disconnected—The Wonderware Historian driver has not opened a network connection. For example, this could be because the Wonderware Historian database item is not 'in service' or there is a configuration error.
• Failed - <Error Message>—The store-and-forward process has failed in HCAL.
• Pending—Status information is not yet available from HCAL. This is a transitory state.
• Idle—The HCAL store-and-forward cache is idle. That is, HCAL is not currently storing any data in the cache. It is forwarding the data to the Wonderware Historian server.
• Storing Data—HCAL is sending data to the store-and-forward cache, rather than sending data to the Wonderware Historian server.
• Data Stored—The store-and-forward cache has stored data that HCAL has not yet forwarded to the Wonderware Historian server.
• Storing Data and Data Stored—Both Storing Data and Data Stored are true. See above.

For information on resolving anomalies, see Troubleshooting Wonderware Historian Driver Operation.