Learn about general considerations

PI Connector for UFL can be used for collecting data to points that have been previously populated by the UFL Interface. For this, users just need to make sure the tag names stay the same. By default, the PI Connector for UFL prefixes all the tag names with a string, defined in PIPointPrefix.config.json. For more information about the point prefix, see Modify the point prefix.

Other functionality changes to be aware of:

• Due to the fact that the PI Point database cannot be utilized for storing the configuration settings any more, the /ALIAS definitions in Extended Descriptors are ignored. That means that the StoreInPI(Tag, Timestamp, Value, Status, Flag, Annotation) second parameter cannot be used for indirect referencing of PI points.

• Digital tags cannot be automatically created and the Status attribute in StoreEvent() function accepts either strings or positive numeric values.

• Both are compared against entries in the corresponding digital set.

• The Questionable flag is set by any non-zero number of the Questionable attribute in StoreEvent/StoreInPI.

• Annotations are not supported.

• Exception reporting is not implemented.

• Logging to a specific log (OUTPUT=Path) known from the UFL interface has been dropped. Instead, the connector specific messages are available in the Windows Event Viewer in a log called Applications and Services\PI Connectors. Use the Print() function, see Learn about functions and operators, together with log level Informational for viewing the output of the Print() function.