Classes
| Class | Description | |
|---|---|---|
 | DBAPlugin | Annotations read and insert handling. These methods are called either from: - the client call handling for synchronuos calls - the annotation handling thread for asynchronus calls Read attributes from the database. Read modified datapoints from the database. ReadProcessed handling. The data is read from the database and returned in OPC HDA compliant form according the client call parameters. In most application it should only be necessary to adapt the GetItemData() method. ReadRaw handling. An instance of this class is created in the HDAPlugin.dll. Tis instance is used for all database read access. The raw data is read from the database and returned in OPC HDA compliant form according the client call parameters. In most application it should only be necessary to adapt the GetItemData() method. Defines the Server capabilities and status Update handling. The methods update the database by inserting, replacing or deleting data points. These methods are called either from: - the client call handling for synchronuos calls - the update handling thread for asynchronuos calls |
| Definitions | Definitions for this server implementation. |