The PriorityLabel with DataType String specifies the priority of the according sender. The network stack will use the PriorityLabel to look up the priority settings for the transport protocol headers.
The priority labels defined by OPC UA should have the following form:
opc.qos.lbl://<label>
Example values are “opc.qos.lbl://low” or “opc.qos.lbl://high”. The mapping is described in 5.4.6.4.
Note: This version does not define concrete labels. The engineering process needs to provide them and also build up the PriorityMappingTable in OPC 10000-22 accordingly.
This Structure DataType is used to represent the priority lable specific transmit QoS parameters. It is a subtype of the TransmitQosDataType defined in 6.4.1.1.3.
The TransmitQosPriorityDataType is formally defined in Table 122.
Table 122 – TransmitQosPriorityDataType structure
Name |
Type |
Description |
TransmitQosPriorityDataType |
Structure |
Subtype of TransmitQosDataType defined in 6.4.1.1.3. |
PriorityLabel |
String |
Defined in 6.4.1.1.4.1. |
Its representation in the AddressSpace is defined in Table 123.
Table 123 – TransmitQosPriorityDataType definition
Attributes |
Value |
BrowseName |
TransmitQosPriorityDataType |
IsAbstract |
False |
Subtype of TransmitQosDataType defined in 6.4.1.1.3. |
|
Conformance Units |
|
PubSub Parameters QoS |