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On the top part of the dialog window, there are filter options. Text "Filter" allows showing only the items according to the mask (some of the OPC servers support the so-called star convention).
"Data Type Filter" allows showing the items of a specified data type. The "Empty/Default" option is the default and enables to view viewing all the items.
The user must define whether the filter should be applied on the hierarchical tree structure (check the "Apply to the branches" button) or also on the OPC items (check the "Apply to the items" button).
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The changed conditions come into effect by clicking the "Refresh" button.
Copying tags
A keyboard shortcut Ctrl+C copies the names of tags in a selected branch into the Windows clipboard. All tags will be copied unless a specific tag is selected.
A keyboard shortcut Ctrl+Shift+C copies the names of tags in all browsed branches into the Windows clipboard.
Note: In versions from 20th December 2018 and newer, recycling of browser dialog has been implemented. If the dialog is closed by the Close button or after selecting a tag, it is actually only hidden and it is available for browsing by another I/O tag within the same station so that the tree structure of the browsed objects is preserved. Clicking on the close icon at the top right corner will cause the dialog to be really closed.
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Implementation of this protocol partially supports the specification of OPC HDA (Historical Data Access). The synchronous reading of raw data is supported. TELL command GETOLDVAL activates the reading of historical values. The asynchronous option IOPCAsyncIO of mode for OPC DA should be set to continuously read both the historical data and the current one.
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