This OPC UA Variable of DataType Int32 belongs to the Variable LastScanData and represents the RSSI Value with which the last AutoID Identifier was scanned.
The Variable can be provided for simple applications where OPC UA Clients are limited to Data Access functionality. Such OPC UA Clients are typically limited to built-in DataTypes like UtcTime. The use of this Variable implies the following restrictions.
- Only one AutoID Identifier can be delivered for a scan.
- The frequency of scans is limited to the sampling interval set by the OPC UA Client.
- The delivery of scan results depends on the MonitoredItem settings or Read behaviour of the OPC UA Client.
It is recommended that complex applications use scan Methods and Events.