Virtual items are used like any other server item except for one detail; they are not connected to any real datapoint on bus level. They can be used to store data. They may be connected to a any other server item.
File location
<WorkspaceDirectory>\DataFiles\nxaVirtualItems.40.dat
| # | Name | M/O | Descrition |
|---|---|---|---|
| 1 | Name | M | Name of the virtual item. Together with the path it must be unique. |
| 2 | Path | O | Specifies the path of the virtual item. Delimiter between sections of the path is the backslash \. |
| 3 | Description | O | Description of the virtual item. It will be displayed in the item tree. |
| 4 | Data Type | M | Possible data types are BOOL, STR, BYTE, CHAR, INT8, UINT8, INT16, UINT16, INT32, UINT32, INT64, UINT64, FLOAT, DOUBLE, DATE, TIME. |
| 5 | Access Rights | O | Allowed operations on the virtual item:
|
| 6 | Persistent | O | Specifies whether the value of the virtual item is persistent (restored from the database after server start up ) or not. Default is F (non-persistent). |
| 7 | Synchronize | O | If set to "T", the value is synchronized between the main and backup server (if present). Default is F (no synchronization). This applies only to main/backup configurations of the NETx Server. |
| 8 | Link Item ID | O | If a connection to another item is necessary the item ID of this one has to be placed here (bidirectional link between Virtual item and Linked item). |
| 9 | Script For OnReceive | O | Implement any LUA script here which shall be called at the OnReceived event. |
| 10 | Script For OnSend | O | Implement any LUA script here which shall be called at the OnSent event. |
| 11 | Script For OnSet | O | Implement any LUA script here which shall be called at the OnSet event. |
| 12 | Comment | O | Optional comment of the virtual item definition. The value is only used for documentation purposes. |