In the Database Schema, the Aggregates section shows information about the Aggregates of the class (aggregates are special types of class that act as an extension of another class).
Example:
The Aggregates section for the CGenericModbusOSPSTN class shows information about the aggregates of the CGenericModbusOSPSTN database class.
For each Aggregate of the class, the following information is shown:
- Name—The name of the aggregate.
- OPC Property—The OPC identifier for the aggregate. This is required when using the aggregate with some third-party OPC applications.
- Fixed—Each aggregate can be fixed or optional (that is, can be enabled or disabled).
If the aggregate is fixed, every item of that class has the aggregate.
If the aggregate is optional, then the aggregate can be enabled or disabled for each individual item of the class.
- Default—Indicates whether the aggregate is enabled by default (Yes or No).
- Class(es)—Shows the class(es) of the aggregate. For single-class aggregates there is one class, and for multiple-class aggregates there are several classes (see Aggregates).
Example:
The CSCADAPackMOSDirect class contains the Network aggregate and the PSTN aggregate.
The Classes of the Network aggregate are CSingleNetwork (Single Network) and CDualNetwork (Dual Network).
The Class of the PSTN aggregate is CAdvModbusPSTN.