Retrieves the double value associated with the specified tag from the SA OPC server’s address space.
0 |
String |
OPC Server DA Tag Name |
The tag name associated with the data in the address space. |
1 |
Double |
Value |
The value associated with the specified tag name. |
SUCCESS |
The value was retrieved successfully. |
FAILURE |
The OPC server is not running, or the specified tag does not exist in the server’s address space. |
If the address space does not contain a value with the specified tag, the command will fail.