In terms of OpenSCADA, the following objects of the data model to serve the data acquisition mechanism are provided:
- "Attribute" — reflection object of the signal data, includes the current value of the specified type of signal and access to the history of the change of these values;
- "Parameter" — object of the attributes' group with the structure corresponding to the characteristics of the separate data source;
- "Controller object" — object of the separate data device. Typically, this is a separate MOD module or a device of industrial PLC.