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Browsing the OPC server address space

Description:
The window allows to view and select data items offered by the OPC server (specified in the configurator PmOpcClient > OPC). Each data item is positively identified by OPC identifier ItemId.
 
This window can be opened:
- In the ItemID configurator of each data item. Designed for single item selection.
- On the Data page in the Import button by the "Selection from OPC server" option. Multiple data items can be selected on one level by the Ctrl key, or by the Shift key. After this window is closed, the "Common properties of selected OPC items" window is opened.
Configuration items:
Item group tree (left)Clicking one item in the tree will select one level of data items.
Item group (right) Here is the list of all items on the selected level.
Note:
The OPC server items can be selected only if the OPC server supports the OPC standard version 2 and higher. The OPC server can offer following items:
- in linear structure: i.e. all items are offered on one level. Suitable when a low number of items is offered.
- in a tree structure: i.e. the items are divided into multiple levels. Suitable for higher numbers of offered items.
 
If the OPC server contains high number of items (e.g. a million registers), then all these items need not to be offered individually. Also a "torso" type identifier can be used and the designer then has to "modify" it in order to get the real register number.
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