Online OPC item browsing (dynamic browsing)

The online OPC browsing for ControlLogix, CompactLogix, FlexLogix, GuardLogix, PLC-5, SLC500, MicroLogix, and SoftLogix processor items is implemented by the Communication Driver. Using the information retrieved from the processor's tag database, the ABCIP Communication Driver will dynamically create a configuration hierarchy that allows the OI Engine to browse into it.

When it detects that the processor's tag database has changed while browsing, the ABCIP Communication Driver will update the internal tag database but not the configuration hierarchy until the $SYS$BrowseTags system tag is poked with "1."

Note: The OPC item browsing capability is available on-line only when the ABCIP Communication Driver is connecting to the corresponding processor and its tag database is available for access. Otherwise, only off-line items (system items and saved device items) will be displayed.

Note: By default, dynamic OPC browsing of tags from the Communication Driver is disabled. In order to browse tags online from the Communication Driver, a "1" must be written to the $SYS$BrowseTags system tag associated with the chosen processor hierarchy node. Subsequent OPC item browsing operation on this particular processor should be enabled.