This OPC UA Interface defines the content of an SrClass. The ISrClassTypeis formally defined in Table 8.

Table 8– ISrClassType definition

Attribute

Value

BrowseName

ISrClassType

IsAbstract

True

References

NodeClass

BrowseName

DataType

TypeDefinition

Modelling Rule

Subtype of the BaseInterfaceTypedefined in OPC 10000-5

HasComponent

Variable

Id

Byte

BaseDataVariableType

Mandatory

HasComponent

Variable

Priority

Byte

BaseDataVariableType

Mandatory

HasComponent

Variable

Vid

UInt16

BaseDataVariableType

Mandatory

Conformance Units

BNM TSN Base Info

Idis a Byte and specifies the SRclassID in a numeric representation of the SR classes which is supported by a particular Bridge Port (see IEEE 802.1Q-2018, clause 35.2.2.9.2, SRclassID). Only Values between 0 and 7 shall be used.

Priorityis a Byteand holds the Data Frame Priority (item a) in IEEE 802.1Q-2018clause 35.2.2.8.5) value that will be used for streams that belong to the associated SR class. (see IEEE 802.1Q-2018, clause 35.2.2.9.3, SRclassPriority). Only Values between 0 and 7 shall be used.

Vidis an UInt16and contains the SR_PVID (item i) in IEEE 802.1Q-2018clause 35.2.1.4) that the associated streams will be tagged with by the Talker (see IEEE 802.1Q-2018, clause 35.2.2.9.4, SRclassVID).