This ObjectType is used to indicate the configuration capabilities of the PubSub functionality in the OPC UA Application.
The PubSubCapabilitiesType is formally defined in Table 305.
Table 305 – PubSubCapabilitiesType definition
|
Attribute |
Value |
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|
BrowseName |
PubSubCapabilitiesType |
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|
IsAbstract |
False |
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|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
|
Subtype of BaseObjectType defined in OPC 10000-5. |
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|
HasProperty |
Variable |
MaxPubSubConnections |
UInt32 |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
MaxWriterGroups |
UInt32 |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
MaxReaderGroups |
UInt32 |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
MaxDataSetWriters |
UInt32 |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
MaxDataSetReaders |
UInt32 |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
MaxFieldsPerDataSet |
UInt32 |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
MaxDataSetWritersPerGroup |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
MaxSecurityGroups |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
MaxPushTargets |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
MaxPublishedDataSets |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
MaxStandaloneSubscribedDataSets |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
MaxNetworkMessageSizeDatagram |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
MaxNetworkMessageSizeBroker |
UInt32 |
PropertyType |
Optional |
|
HasProperty |
Variable |
SupportSecurityKeyPull |
Boolean |
PropertyType |
Optional |
|
HasProperty |
Variable |
SupportSecurityKeyPush |
Boolean |
PropertyType |
Optional |
|
HasProperty |
Variable |
SupportSecurityKeyServer |
Boolean |
PropertyType |
Optional |
|
Conformance Units |
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|
PubSub Model Base |
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The maximum numbers of objects related to configuration capabilities are expected to be configurable in the OPC UA Application but the capability to operate all configured objects at the same time depends on different parameters like timing settings and it is not ensured that any combination of enabled objects in the configuration can be executed.
The MaxPubSubConnections Variable defines the maximum number of PubSubConnections that can be configured for the OPC UA Application. A value of 0 indicates that the OPC UA Application forces no limit on the number of connections.
The MaxWriterGroups Variable defines the maximum number of WriterGroups that can be configured for the OPC UA Application. A value of 0 indicates that the OPC UA Application forces no limit on the number of WriterGroups.
The MaxReaderGroups Variable defines the maximum number of ReaderGroups that can be configured for the OPC UA Application. A value of 0 indicates that the OPC UA Application forces no limit on the number of ReaderGroups.
The MaxDataSetWriters Variable defines the maximum number of DataSetWriters that can be configured for the OPC UA Application. A value of 0 indicates that the OPC UA Application forces no limit on the number of DataSetWriters.
The MaxDataSetReaders Variable defines the maximum number of DataSetReaders that can be configured for the OPC UA Application. A value of 0 indicates that the OPC UA Application forces no limit on the number of DataSetReaders.
The MaxFieldsPerDataSet Variable defines the maximum number of fields that can be configured for a PublishedDataSet. A value of 0 indicates that the OPC UA Application forces no limit on the number of fields.
The MaxDataSetWritersPerGroup Variable defines the maximum number of DataSetWriters that can be configured in one WriterGroup. A value of 0 indicates that the OPC UA Application forces no limit on the number of DataSetWriters in one WriterGroup.
The MaxSecurityGroups Variable defines the maximum number of SecurityGroups that can be configured. A value of 0 indicates that the OPC UA Application forces no limit on the number of SecurityGroups.
The MaxPushTargets Variable defines the maximum number of PushTargets that can be configured. A value of 0 indicates that the OPC UA Application forces no limit on the number of PushTargets.
The MaxPublishedDataSets Variable defines the maximum number of PublishedDataSets that can be configured. A value of 0 indicates that the OPC UA Application forces no limit on the number of PublishedDataSets.
The MaxStandaloneSubscribedDataSets Variable defines the maximum number of StandaloneSubscribedDataSets that can be configured. A value of 0 indicates that the OPC UA Application forces no limit on the number of StandaloneSubscribedDataSets.
The MaxNetworkMessageSizeDatagram Variable defines the maximum number of bytes that can be configured as MaxNetworkMessageSize for NetworkMessages sent or received through datagram transport protocol mappings. A value of 0 indicates that the OPC UA Application forces no limit on the maximum size.
The MaxNetworkMessageSizeBroker Variable defines the maximum number of bytes that can be configured as MaxNetworkMessageSize for NetworkMessages sent or received through broker transport protocol mappings. A value of 0 indicates that the OPC UA Application forces no limit on the maximum size.
The SupportSecurityKeyPull Variable indicates if the OPC UA Application is able to pull PubSub security keys from a SKS.
The SupportSecurityKeyPush Variable indicates if the OPC UA Application is able to accept PubSub security keys pushed from a SKS.
The SupportSecurityKeyServer Variable indicates if the OPC UA Application is able to act as a Security Key Server and to manage SecurityGroups.
The PubSub components have KeyValuePair arrays for additional configuration property lists. These optional configuration properties extend the configuration parameters defined for the different PubSub components.
A configuration property is described by Variables with the following information:
- BrowseName of the Variable is used as Key for the property.
- DataType of the Variable defines the DataType of the Value in the KeyValuePair.
- Value of the Variable provides the default value for the property.
- Description of the Variable provides additional information.
- Properties like EURange or EngineeringUnits can be used to provide value ranges and units.
The configuration property descriptions are referenced from the related configuration propeties Node with the HasKeyValueDescription ReferenceType defined in OPC 10000-5.
The SourceNode of References of this type shall be one of the following Nodes:
- ConfigurationProperties Property of the PublishSubscribeType
- ConnectionProperties Property of the PubSubConnectionType or of instances of the PubSubConnectionType
- GroupProperties Property of the GroupType or of instances of the WriterGroupType or ReaderGroupType
- DataSetWriterProperties Property of the DataSetWriterType or of instances of the DataSetWriterType
- DataSetReaderProperties Property of the DataSetReaderType or of instances of the DataSetReaderType
- GroupProperties Property of the SecurityGroupType
- PushTargetProperties Property of the PushTargetType