Use this section in conjunction with data types that are associated with points in the Advanced OPC Driver.
The following data type is common to all the points that you can configure within the Advanced OPC Driver:
- Canonical Type—The native data type. The type of data maintained within the OPC DA server for this item. A server that does not know the canonical type of an item (for examle during start-up) indicates to the client that the data type is not currently known but will be determined at some future time. The canonical data type of an item is shown in the Advanced OPC Point Status Attributes.
If you configure the point's data type as Canonical Type, the server will report values for the item in its native type and the driver will convert the values to the points type (if different).
If you configure the point's data type as any of the other types then the server will convert values to the configured type (if needed) and then report the converted values.
Configuring the data type determines where data conversion takes place.
Analog and Digital Point Data Types:
- Boolean—Digital
- 8-bit Integer—Analog/Digital
- 8-bit Unsigned Integer—Analog/Digital
- 16-bit Integer—Analog/Digital
- 16-bit Unsigned Integer—Analog/Digital
- 32-bit Integer—Analog/Digital
- 32-bit Unsigned Integer—Analog/Digital
- 64-bit Integer—Analog/Digital
- 64-bit Unsigned Integer—Analog/Digital
- Single Precision Floating Point—Analog only
- Double Precision Floating Point—Analog only
- Array Boolean—Digital
- Array of 8-bit Integer—Analog/Digital
- Array of 8-bit Unsigned Integer—Analog/Digital
- Array of 16-bit Integer—Analog/Digital
- Array of 16-bit Unsigned Integer—Analog/Digital
- Array of 32-bit Integer—Analog/Digital
- Array of 32-bit Unsigned Integer—Analog/Digital
- Array of 64-bit Integer—Analog/Digital
- Array of 64-bit Unsigned Integer—Analog/Digital
- Array of Single Precision Floating Point—Analog only
- Array of Double Precision Floating Point —Analog only
String Point Specific Types
- String
- Array of String
Time Point Specific Types
- Time
- Array of Time
Further Information
Array Field in the ClearSCADA Guide to Core Configuration.