The item is added to the group if it is not yet added. A synchronous OpcGroup read function is executed.
Overload List
| Overload | Description |
|---|---|
| Read(OPCDATASOURCE,String,OPCItemState) | Read the current value of the specified item. The item is added to the group if it is not yet added. A synchronous OpcGroup read function is executed. |
| Read(OPCDATASOURCE,ItemDef,OPCItemState) | Read the current value of the item specified with the ItemDef object. The ItemDef object was created in a previous Read or Add call. This method overload is a bit more efficient because no ItemID search as to be done. Only in a SyncIOGroup with many items could be a significant performance gain. A synchronous OpcGroup read function is executed. |