7.27 UA_HistoryUpdate
| FB-Name | UA_HistoryUpdate | |||
| This Function Block is used to insert or replace or update data in the historical database. | ||||
| VAR_INPUT | ||||
| B | Execute | BOOL | FB performs its task on rising edge on this input. | |
| B | ConnectionHdl | DWORD | Connection handle. | |
| B | NodeHdl | DWORD | Node handle. | |
| B | PerformInsert | BOOL | ||
| B | PerformReplace | BOOL | ||
| B | DataValueCount | UNIT | Number of values to be inserted, replaced or updates | |
| B | DataValues | ARRAY of UAHADataValue | Array of UAHADataValue See UAHADataValue | |
| B | Timeout | TIME | Time to response. | |
| VAR_OUTPUT | ||||
| B | Done | BOOL | FB has completed its task. | |
| B | Busy | BOOL | The FB is not finished and new output values are to be expected | |
| B | Error | BOOL | Signals that an error has occurred within the Function Block. | |
| B | ErrorID | DWORD | Error code. (StatusCode) | |
| B | ValueErrorIDs | ARRAY OF DWORD | Contains an error code for each valid element. | |
| Notes: The idea of this scenario is to have an OPC UA server with HA (Historical Access) functionality available, either local on the same system or remotely in the network. In traditional way the OPC UA Server is responsible to collect data on his own from the underlying process. This FB UA_HistoryUpdate allows the OPC UA-HA Server to stay inactive and wait that an OPC UA client is actively pushing data into OPC UA-HA-Server making use of the Server’s HistoryUpdate interface. | ||||
| UA_HistoryUpdate | ||||||
| BOOL | Execute | Done | BOOL | |||
| DWORD | ConnectionHdl | Busy | BOOL | |||
| DWORD | NodeHdl | Error | BOOL | |||
| BOOL | PerformInsert | ErrorID | DWORD | |||
| BOOL | PerformReplace | ValueErrorIDs | ARRAY OF DWORD | |||
| UINT | DataValueCount | |||||
| ARRAY OF UAHADataValue | DataValues | |||||
| TIME | Timeout | |||||