QOpcUa Namespace

The QOpcUa namespace contains miscellaneous identifiers used throughout the Qt OPC UA library. More...

Header:

#include <QOpcUa>

Namespaces

namespace

NodeIds

Types

flags	AccessLevel
enum class	AccessLevelBit { None, CurrentRead, CurrentWrite, HistoryRead, HistoryWrite, …, TimestampWrite }
enum class	AxisScale { Linear, Log, Ln }
enum class	ErrorCategory { NoError, NodeError, AttributeError, PermissionError, ArgumentError, …, UnspecifiedError }
flags	EventNotifier
enum class	EventNotifierBit { None, SubscribeToEvents, HistoryRead, HistoryWrite }
enum class	NodeAttribute { None, NodeId, NodeClass, BrowseName, DisplayName, …, UserExecutable }
flags	NodeAttributes
enum class	NodeClass { Undefined, Object, Variable, Method, ObjectType, …, View }
flags	NodeClasses
enum class	ReferenceTypeId { Unspecified, References, NonHierarchicalReferences, HierarchicalReferences, HasChild, …, HasCondition }
	TypedVariant
enum	Types { Boolean, Int32, UInt32, Double, Float, …, Undefined }
enum	UaStatusCode { Good, BadUnexpectedError, BadInternalError, BadOutOfMemory, BadResourceUnavailable, …, BadMaxConnectionsReached }
flags	WriteMask
enum class	WriteMaskBit { None, AccessLevel, ArrayDimensions, BrowseName, ContainsNoLoops, …, ValueForVariableType }

Functions

QOpcUa::ErrorCategory	errorCategory(QOpcUa::UaStatusCode statusCode)
bool	isSecurePolicy(const QString &securityPolicy)
bool	isSuccessStatus(QOpcUa::UaStatusCode statusCode)
QOpcUa::Types	metaTypeToQOpcUaType(QMetaType::Type type)
QString	namespace0Id(QOpcUa::NodeIds::Namespace0 id)
QOpcUa::NodeIds::Namespace0	namespace0IdFromNodeId(const QString &nodeId)
QString	namespace0IdName(QOpcUa::NodeIds::Namespace0 id)
bool	nodeIdEquals(const QString &first, const QString &second)
QString	nodeIdFromByteString(quint16 ns, const QByteArray &identifier)
QString	nodeIdFromGuid(quint16 ns, const QUuid &identifier)
QString	nodeIdFromInteger(quint16 ns, quint32 identifier)
QString	nodeIdFromReferenceType(QOpcUa::ReferenceTypeId referenceType)
QString	nodeIdFromString(quint16 ns, const QString &identifier)
bool	nodeIdStringSplit(const QString &nodeIdString, quint16 *nsIndex, QString *identifier, char *identifierType)
size_t	qHash(const QOpcUa::NodeAttribute &attr)
QString	statusToString(QOpcUa::UaStatusCode statusCode)

Detailed Description

Type Documentation

enum class QOpcUa::AccessLevelBitflags QOpcUa::AccessLevel

This enum contains all possible bits for the AccessLevel and UserAccessLevel node attributes defined in OPC-UA part 3, Table 8.

Constant	Value	Description
QOpcUa::AccessLevelBit::None	0	No read access to the Value attribute is permitted.
QOpcUa::AccessLevelBit::CurrentRead	(1 << 0)	The current value can be read.
QOpcUa::AccessLevelBit::CurrentWrite	(1 << 1)	The current value can be written.
QOpcUa::AccessLevelBit::HistoryRead	(1 << 2)	The history of the value is readable.
QOpcUa::AccessLevelBit::HistoryWrite	(1 << 3)	The history of the value is writable.
QOpcUa::AccessLevelBit::SemanticChange	(1 << 4)	The property variable generates SemanticChangeEvents.
QOpcUa::AccessLevelBit::StatusWrite	(1 << 5)	The status code of the value is writable.
QOpcUa::AccessLevelBit::TimestampWrite	(1 << 6)	The SourceTimestamp is writable.

The AccessLevel type is a typedef for QFlags<AccessLevelBit>. It stores an OR combination of AccessLevelBit values.

enum class QOpcUa::AxisScale

The AxisScale enum as defined by OPC-UA part 8, 5.6.7.

Constant	Value
QOpcUa::AxisScale::Linear	0
QOpcUa::AxisScale::Log	1
QOpcUa::AxisScale::Ln	2

enum class QOpcUa::ErrorCategory

This enum contains simplified categories for OPC UA errors.

Constant	Value	Description
QOpcUa::ErrorCategory::NoError	0	The operation has been successful.
QOpcUa::ErrorCategory::NodeError	1	There is a problem with the node, e. g. it does not exist.
QOpcUa::ErrorCategory::AttributeError	2	The attributes to operate on where invalid.
QOpcUa::ErrorCategory::PermissionError	3	The user did not have the permission to perform the operation.
QOpcUa::ErrorCategory::ArgumentError	4	The arguments supplied by the user were invalid or incomplete.
QOpcUa::ErrorCategory::TypeError	5	There has been a type mismatch for a write operation.
QOpcUa::ErrorCategory::ConnectionError	6	Communication with the server did not work as expected.
QOpcUa::ErrorCategory::UnspecifiedError	7	Any error that is not categorized. The detailed status code must be checked.

enum class QOpcUa::EventNotifierBitflags QOpcUa::EventNotifier

This enum contains all possible bits for the EventNotifier node attribute defined in OPC-UA part 3, Table 6.

Constant	Value	Description
QOpcUa::EventNotifierBit::None	0	The node can't be used to interact with events.
QOpcUa::EventNotifierBit::SubscribeToEvents	(1 << 0)	A client can subscribe to events.
QOpcUa::EventNotifierBit::HistoryRead	(1 << 2)	A client can read the event history.
QOpcUa::EventNotifierBit::HistoryWrite	(1 << 3)	A client can write the event history.

The EventNotifier type is a typedef for QFlags<EventNotifierBit>. It stores an OR combination of EventNotifierBit values.

enum class QOpcUa::NodeAttributeflags QOpcUa::NodeAttributes

This enum contains the 22 node attributes defined in OPC-UA part 4, 5.

Constant	Value	Description
QOpcUa::NodeAttribute::None	0	No node attribute.
QOpcUa::NodeAttribute::NodeId	(1 << 0)	Mandatory for all nodes. Contains the node's id in the OPC UA address space.
QOpcUa::NodeAttribute::NodeClass	(1 << 1)	Mandatory for all nodes. Contains the node id describing the node class of the node.
QOpcUa::NodeAttribute::BrowseName	(1 << 2)	Mandatory for all nodes. Contains a non-localized human readable name of the node.
QOpcUa::NodeAttribute::DisplayName	(1 << 3)	Mandatory for all nodes. Contains a localized human readable name for display purposes.
QOpcUa::NodeAttribute::Description	(1 << 4)	Contains a localized human readable description of the node.
QOpcUa::NodeAttribute::WriteMask	(1 << 5)	Contains a bit mask. Each bit corresponds to a writable attribute (OPC-UA part 3, Table 3).
QOpcUa::NodeAttribute::UserWriteMask	(1 << 6)	Same as WriteMask but for the current user.
QOpcUa::NodeAttribute::IsAbstract	(1 << 7)	True if the node is an abstract type which means that no nodes of this type shall exist.
QOpcUa::NodeAttribute::Symmetric	(1 << 8)	True if a reference's meaning is the same seen from both ends.
QOpcUa::NodeAttribute::InverseName	(1 << 9)	The localized inverse name of a reference (for example "HasSubtype" has the InverseName "SubtypeOf").
QOpcUa::NodeAttribute::ContainsNoLoops	(1 << 10)	True if there is no way to get back to a node following forward references in the current view.
QOpcUa::NodeAttribute::EventNotifier	(1 << 11)	Contains a bit mask used to indicate if subscribing to events and access to historic events is supported (OPC-UA part 3, Table 5).
QOpcUa::NodeAttribute::Value	(1 << 12)	The value of a Variable node.
QOpcUa::NodeAttribute::DataType	(1 << 13)	The NodeId of the Value attribute's data type (for example "ns=0;i=13" for DateTime, see https://opcfoundation.org/UA/schemas/1.03/NodeIds.csv).
QOpcUa::NodeAttribute::ValueRank	(1 << 14)	Contains information about the structure of the Value attribute (scalar/array) (OPC-UA part 3, Table 8).
QOpcUa::NodeAttribute::ArrayDimensions	(1 << 15)	An array containing the length for each dimension of a multi-dimensional array.
QOpcUa::NodeAttribute::AccessLevel	(1 << 16)	Contains a bit mask. Each bit corresponds to an access capability (OPC-UA part 3, Table 8).
QOpcUa::NodeAttribute::UserAccessLevel	(1 << 17)	Same as AccessLevel, but for the current user.
QOpcUa::NodeAttribute::MinimumSamplingInterval	(1 << 18)	Contains the shortest possible interval in which the server is able to sample the value.
QOpcUa::NodeAttribute::Historizing	(1 << 19)	True if historical data is collected.
QOpcUa::NodeAttribute::Executable	(1 << 20)	True if the node is currently executable. Only relevant for Method nodes.
QOpcUa::NodeAttribute::UserExecutable	(1 << 21)	Same as Executable, but for the current user.

The NodeAttributes type is a typedef for QFlags<NodeAttribute>. It stores an OR combination of NodeAttribute values.

enum class QOpcUa::NodeClassflags QOpcUa::NodeClasses

This enum specifies the class a node belongs to. OPC-UA specifies a fixed set of eight different classes.

Constant	Value	Description
QOpcUa::NodeClass::Undefined	0	The node class is not known. This is the case before the NodeClass attribute has been read on the server.
QOpcUa::NodeClass::Object	1	An Object node.
QOpcUa::NodeClass::Variable	2	A Variable node.
QOpcUa::NodeClass::Method	4	A Method node.
QOpcUa::NodeClass::ObjectType	8	An ObjectType node.
QOpcUa::NodeClass::VariableType	16	A VariableType node.
QOpcUa::NodeClass::ReferenceType	32	A ReferenceType node.
QOpcUa::NodeClass::DataType	64	A DataType node.
QOpcUa::NodeClass::View	128	A View node.

The NodeClasses type is a typedef for QFlags<NodeClass>. It stores an OR combination of NodeClass values.

enum class QOpcUa::ReferenceTypeId

This enum contains the reference types specified in OPC-UA part 3, 7. They are used to filter for a certain reference type in QOpcUaNode::browseChildren and for the reference type information in QOpcUaReferenceDescription.

Constant	Value	Description
QOpcUa::ReferenceTypeId::Unspecified	0	Not a valid reference type.
QOpcUa::ReferenceTypeId::References	31	The abstract base type for all references.
QOpcUa::ReferenceTypeId::NonHierarchicalReferences	32	The abstract base type for all non-hierarchical references.
QOpcUa::ReferenceTypeId::HierarchicalReferences	33	The abstract base type for all hierarchical references.
QOpcUa::ReferenceTypeId::HasChild	34	The abstract base type for all non-looping hierarchical references.
QOpcUa::ReferenceTypeId::Organizes	35	The type for hierarchical references that are used to organize nodes.
QOpcUa::ReferenceTypeId::HasEventSource	36	The type for non-looping hierarchical references that are used to organize event sources.
QOpcUa::ReferenceTypeId::HasModellingRule	37	The type for references from instance declarations to modelling rule nodes.
QOpcUa::ReferenceTypeId::HasEncoding	38	The type for references from data type nodes to to data type encoding nodes.
QOpcUa::ReferenceTypeId::HasDescription	39	The type for references from data type encoding nodes to data type description nodes.
QOpcUa::ReferenceTypeId::HasTypeDefinition	40	The type for references from a instance node to its type definition node.
QOpcUa::ReferenceTypeId::GeneratesEvent	41	The type for references from a node to an event type that is raised by node.
QOpcUa::ReferenceTypeId::Aggregates	44	The type for non-looping hierarchical references that are used to aggregate nodes into complex types.
QOpcUa::ReferenceTypeId::HasSubtype	45	The type for non-looping hierarchical references that are used to define sub types.
QOpcUa::ReferenceTypeId::HasProperty	46	The type for non-looping hierarchical reference from a node to its property.
QOpcUa::ReferenceTypeId::HasComponent	47	The type for non-looping hierarchical reference from a node to its component.
QOpcUa::ReferenceTypeId::HasNotifier	48	The type for non-looping hierarchical references that are used to indicate how events propagate from node to node.
QOpcUa::ReferenceTypeId::HasOrderedComponent	49	The type for non-looping hierarchical reference from a node to its component when the order of references matters.
QOpcUa::ReferenceTypeId::FromState	51	The type for a reference to the state before a transition.
QOpcUa::ReferenceTypeId::ToState	52	The type for a reference to the state after a transition.
QOpcUa::ReferenceTypeId::HasCause	53	The type for a reference to a method that can cause a transition to occur.
QOpcUa::ReferenceTypeId::HasEffect	54	The type for a reference to an event that may be raised when a transition occurs.
QOpcUa::ReferenceTypeId::HasHistoricalConfiguration	56	The type for a reference to the historical configuration for a data variable.
QOpcUa::ReferenceTypeId::HasSubStateMachine	117	The type for a reference to a substate for a state.
QOpcUa::ReferenceTypeId::AlwaysGeneratesEvent	3065	The type for references from a node to an event type that is always raised by node.
QOpcUa::ReferenceTypeId::HasTrueSubState	9004	The type for references from a TRUE super state node to a subordinate state node.
QOpcUa::ReferenceTypeId::HasFalseSubState	9005	The type for references from a FALSE super state node to a subordinate state node.
QOpcUa::ReferenceTypeId::HasCondition	9006	The type for references from a ConditionSource node to a Condition.

QOpcUa::TypedVariant

This is QPair<QVariant, QOpcUa::Types>.

enum QOpcUa::Types

Enumerates the types supported by Qt OPC UA.

Constant	Value	Description
QOpcUa::Boolean	0
QOpcUa::Int32	1
QOpcUa::UInt32	2
QOpcUa::Double	3
QOpcUa::Float	4
QOpcUa::String	5
QOpcUa::LocalizedText	6
QOpcUa::DateTime	7
QOpcUa::UInt16	8
QOpcUa::Int16	9
QOpcUa::UInt64	10
QOpcUa::Int64	11
QOpcUa::Byte	12
QOpcUa::SByte	13
QOpcUa::ByteString	14
QOpcUa::XmlElement	15
QOpcUa::NodeId	16
QOpcUa::Guid	17
QOpcUa::QualifiedName	18	A name qualified by an OPC UA namespace index.
QOpcUa::StatusCode	19
QOpcUa::ExtensionObject	20	A data structure which contains a serialized object.
QOpcUa::Range	21	A range composed from the two double values low and high.
QOpcUa::EUInformation	22	The unit of measurement for an analog value.
QOpcUa::ComplexNumber	23	The OPC UA ComplexNumber type.
QOpcUa::DoubleComplexNumber	24	The OPC UA DoubleComplexNumber type.
QOpcUa::AxisInformation	25	Information about an axis.
QOpcUa::XV	26	A float value with a double precision position on an axis.
QOpcUa::ExpandedNodeId	27	A node id with additional namespace URI and server index.
QOpcUa::Argument	28	The OPC UA Argument type.
QOpcUa::Undefined	0xFFFFFFFF

enum QOpcUa::UaStatusCode

Enumerates all status codes from https://opcfoundation.org/UA/schemas/1.03/Opc.Ua.StatusCodes.csv

Constant	Value
QOpcUa::Good	0
QOpcUa::BadUnexpectedError	0x80010000
QOpcUa::BadInternalError	0x80020000
QOpcUa::BadOutOfMemory	0x80030000
QOpcUa::BadResourceUnavailable	0x80040000
QOpcUa::BadCommunicationError	0x80050000
QOpcUa::BadEncodingError	0x80060000
QOpcUa::BadDecodingError	0x80070000
QOpcUa::BadEncodingLimitsExceeded	0x80080000
QOpcUa::BadRequestTooLarge	0x80B80000
QOpcUa::BadResponseTooLarge	0x80B90000
QOpcUa::BadUnknownResponse	0x80090000
QOpcUa::BadTimeout	0x800A0000
QOpcUa::BadServiceUnsupported	0x800B0000
QOpcUa::BadShutdown	0x800C0000
QOpcUa::BadServerNotConnected	0x800D0000
QOpcUa::BadServerHalted	0x800E0000
QOpcUa::BadNothingToDo	0x800F0000
QOpcUa::BadTooManyOperations	0x80100000
QOpcUa::BadTooManyMonitoredItems	0x80DB0000
QOpcUa::BadDataTypeIdUnknown	0x80110000
QOpcUa::BadCertificateInvalid	0x80120000
QOpcUa::BadSecurityChecksFailed	0x80130000
QOpcUa::BadCertificateTimeInvalid	0x80140000
QOpcUa::BadCertificateIssuerTimeInvalid	0x80150000
QOpcUa::BadCertificateHostNameInvalid	0x80160000
QOpcUa::BadCertificateUriInvalid	0x80170000
QOpcUa::BadCertificateUseNotAllowed	0x80180000
QOpcUa::BadCertificateIssuerUseNotAllowed	0x80190000
QOpcUa::BadCertificateUntrusted	0x801A0000
QOpcUa::BadCertificateRevocationUnknown	0x801B0000
QOpcUa::BadCertificateIssuerRevocationUnknown	0x801C0000
QOpcUa::BadCertificateRevoked	0x801D0000
QOpcUa::BadCertificateIssuerRevoked	0x801E0000
QOpcUa::BadCertificateChainIncomplete	0x810D0000
QOpcUa::BadUserAccessDenied	0x801F0000
QOpcUa::BadIdentityTokenInvalid	0x80200000
QOpcUa::BadIdentityTokenRejected	0x80210000
QOpcUa::BadSecureChannelIdInvalid	0x80220000
QOpcUa::BadInvalidTimestamp	0x80230000
QOpcUa::BadNonceInvalid	0x80240000
QOpcUa::BadSessionIdInvalid	0x80250000
QOpcUa::BadSessionClosed	0x80260000
QOpcUa::BadSessionNotActivated	0x80270000
QOpcUa::BadSubscriptionIdInvalid	0x80280000
QOpcUa::BadRequestHeaderInvalid	0x802A0000
QOpcUa::BadTimestampsToReturnInvalid	0x802B0000
QOpcUa::BadRequestCancelledByClient	0x802C0000
QOpcUa::BadTooManyArguments	0x80E50000
QOpcUa::GoodSubscriptionTransferred	0x002D0000
QOpcUa::GoodCompletesAsynchronously	0x002E0000
QOpcUa::GoodOverload	0x002F0000
QOpcUa::GoodClamped	0x00300000
QOpcUa::BadNoCommunication	0x80310000
QOpcUa::BadWaitingForInitialData	0x80320000
QOpcUa::BadNodeIdInvalid	0x80330000
QOpcUa::BadNodeIdUnknown	0x80340000
QOpcUa::BadAttributeIdInvalid	0x80350000
QOpcUa::BadIndexRangeInvalid	0x80360000
QOpcUa::BadIndexRangeNoData	0x80370000
QOpcUa::BadDataEncodingInvalid	0x80380000
QOpcUa::BadDataEncodingUnsupported	0x80390000
QOpcUa::BadNotReadable	0x803A0000
QOpcUa::BadNotWritable	0x803B0000
QOpcUa::BadOutOfRange	0x803C0000
QOpcUa::BadNotSupported	0x803D0000
QOpcUa::BadNotFound	0x803E0000
QOpcUa::BadObjectDeleted	0x803F0000
QOpcUa::BadNotImplemented	0x80400000
QOpcUa::BadMonitoringModeInvalid	0x80410000
QOpcUa::BadMonitoredItemIdInvalid	0x80420000
QOpcUa::BadMonitoredItemFilterInvalid	0x80430000
QOpcUa::BadMonitoredItemFilterUnsupported	0x80440000
QOpcUa::BadFilterNotAllowed	0x80450000
QOpcUa::BadStructureMissing	0x80460000
QOpcUa::BadEventFilterInvalid	0x80470000
QOpcUa::BadContentFilterInvalid	0x80480000
QOpcUa::BadFilterOperatorInvalid	0x80C10000
QOpcUa::BadFilterOperatorUnsupported	0x80C20000
QOpcUa::BadFilterOperandCountMismatch	0x80C30000
QOpcUa::BadFilterOperandInvalid	0x80490000
QOpcUa::BadFilterElementInvalid	0x80C40000
QOpcUa::BadFilterLiteralInvalid	0x80C50000
QOpcUa::BadContinuationPointInvalid	0x804A0000
QOpcUa::BadNoContinuationPoints	0x804B0000
QOpcUa::BadReferenceTypeIdInvalid	0x804C0000
QOpcUa::BadBrowseDirectionInvalid	0x804D0000
QOpcUa::BadNodeNotInView	0x804E0000
QOpcUa::BadServerUriInvalid	0x804F0000
QOpcUa::BadServerNameMissing	0x80500000
QOpcUa::BadDiscoveryUrlMissing	0x80510000
QOpcUa::BadSempahoreFileMissing	0x80520000
QOpcUa::BadRequestTypeInvalid	0x80530000
QOpcUa::BadSecurityModeRejected	0x80540000
QOpcUa::BadSecurityPolicyRejected	0x80550000
QOpcUa::BadTooManySessions	0x80560000
QOpcUa::BadUserSignatureInvalid	0x80570000
QOpcUa::BadApplicationSignatureInvalid	0x80580000
QOpcUa::BadNoValidCertificates	0x80590000
QOpcUa::BadIdentityChangeNotSupported	0x80C60000
QOpcUa::BadRequestCancelledByRequest	0x805A0000
QOpcUa::BadParentNodeIdInvalid	0x805B0000
QOpcUa::BadReferenceNotAllowed	0x805C0000
QOpcUa::BadNodeIdRejected	0x805D0000
QOpcUa::BadNodeIdExists	0x805E0000
QOpcUa::BadNodeClassInvalid	0x805F0000
QOpcUa::BadBrowseNameInvalid	0x80600000
QOpcUa::BadBrowseNameDuplicated	0x80610000
QOpcUa::BadNodeAttributesInvalid	0x80620000
QOpcUa::BadTypeDefinitionInvalid	0x80630000
QOpcUa::BadSourceNodeIdInvalid	0x80640000
QOpcUa::BadTargetNodeIdInvalid	0x80650000
QOpcUa::BadDuplicateReferenceNotAllowed	0x80660000
QOpcUa::BadInvalidSelfReference	0x80670000
QOpcUa::BadReferenceLocalOnly	0x80680000
QOpcUa::BadNoDeleteRights	0x80690000
QOpcUa::UncertainReferenceNotDeleted	0x40BC0000
QOpcUa::BadServerIndexInvalid	0x806A0000
QOpcUa::BadViewIdUnknown	0x806B0000
QOpcUa::BadViewTimestampInvalid	0x80C90000
QOpcUa::BadViewParameterMismatch	0x80CA0000
QOpcUa::BadViewVersionInvalid	0x80CB0000
QOpcUa::UncertainNotAllNodesAvailable	0x40C00000
QOpcUa::GoodResultsMayBeIncomplete	0x00BA0000
QOpcUa::BadNotTypeDefinition	0x80C80000
QOpcUa::UncertainReferenceOutOfServer	0x406C0000
QOpcUa::BadTooManyMatches	0x806D0000
QOpcUa::BadQueryTooComplex	0x806E0000
QOpcUa::BadNoMatch	0x806F0000
QOpcUa::BadMaxAgeInvalid	0x80700000
QOpcUa::BadSecurityModeInsufficient	0x80E60000
QOpcUa::BadHistoryOperationInvalid	0x80710000
QOpcUa::BadHistoryOperationUnsupported	0x80720000
QOpcUa::BadInvalidTimestampArgument	0x80BD0000
QOpcUa::BadWriteNotSupported	0x80730000
QOpcUa::BadTypeMismatch	0x80740000
QOpcUa::BadMethodInvalid	0x80750000
QOpcUa::BadArgumentsMissing	0x80760000
QOpcUa::BadTooManySubscriptions	0x80770000
QOpcUa::BadTooManyPublishRequests	0x80780000
QOpcUa::BadNoSubscription	0x80790000
QOpcUa::BadSequenceNumberUnknown	0x807A0000
QOpcUa::BadMessageNotAvailable	0x807B0000
QOpcUa::BadInsufficientClientProfile	0x807C0000
QOpcUa::BadStateNotActive	0x80BF0000
QOpcUa::BadTcpServerTooBusy	0x807D0000
QOpcUa::BadTcpMessageTypeInvalid	0x807E0000
QOpcUa::BadTcpSecureChannelUnknown	0x807F0000
QOpcUa::BadTcpMessageTooLarge	0x80800000
QOpcUa::BadTcpNotEnoughResources	0x80810000
QOpcUa::BadTcpInternalError	0x80820000
QOpcUa::BadTcpEndpointUrlInvalid	0x80830000
QOpcUa::BadRequestInterrupted	0x80840000
QOpcUa::BadRequestTimeout	0x80850000
QOpcUa::BadSecureChannelClosed	0x80860000
QOpcUa::BadSecureChannelTokenUnknown	0x80870000
QOpcUa::BadSequenceNumberInvalid	0x80880000
QOpcUa::BadProtocolVersionUnsupported	0x80BE0000
QOpcUa::BadConfigurationError	0x80890000
QOpcUa::BadNotConnected	0x808A0000
QOpcUa::BadDeviceFailure	0x808B0000
QOpcUa::BadSensorFailure	0x808C0000
QOpcUa::BadOutOfService	0x808D0000
QOpcUa::BadDeadbandFilterInvalid	0x808E0000
QOpcUa::UncertainNoCommunicationLastUsableValue	0x408F0000
QOpcUa::UncertainLastUsableValue	0x40900000
QOpcUa::UncertainSubstituteValue	0x40910000
QOpcUa::UncertainInitialValue	0x40920000
QOpcUa::UncertainSensorNotAccurate	0x40930000
QOpcUa::UncertainEngineeringUnitsExceeded	0x40940000
QOpcUa::UncertainSubNormal	0x40950000
QOpcUa::GoodLocalOverride	0x00960000
QOpcUa::BadRefreshInProgress	0x80970000
QOpcUa::BadConditionAlreadyDisabled	0x80980000
QOpcUa::BadConditionAlreadyEnabled	0x80CC0000
QOpcUa::BadConditionDisabled	0x80990000
QOpcUa::BadEventIdUnknown	0x809A0000
QOpcUa::BadEventNotAcknowledgeable	0x80BB0000
QOpcUa::BadDialogNotActive	0x80CD0000
QOpcUa::BadDialogResponseInvalid	0x80CE0000
QOpcUa::BadConditionBranchAlreadyAcked	0x80CF0000
QOpcUa::BadConditionBranchAlreadyConfirmed	0x80D00000
QOpcUa::BadConditionAlreadyShelved	0x80D10000
QOpcUa::BadConditionNotShelved	0x80D20000
QOpcUa::BadShelvingTimeOutOfRange	0x80D30000
QOpcUa::BadNoData	0x809B0000
QOpcUa::BadBoundNotFound	0x80D70000
QOpcUa::BadBoundNotSupported	0x80D80000
QOpcUa::BadDataLost	0x809D0000
QOpcUa::BadDataUnavailable	0x809E0000
QOpcUa::BadEntryExists	0x809F0000
QOpcUa::BadNoEntryExists	0x80A00000
QOpcUa::BadTimestampNotSupported	0x80A10000
QOpcUa::GoodEntryInserted	0x00A20000
QOpcUa::GoodEntryReplaced	0x00A30000
QOpcUa::UncertainDataSubNormal	0x40A40000
QOpcUa::GoodNoData	0x00A50000
QOpcUa::GoodMoreData	0x00A60000
QOpcUa::BadAggregateListMismatch	0x80D40000
QOpcUa::BadAggregateNotSupported	0x80D50000
QOpcUa::BadAggregateInvalidInputs	0x80D60000
QOpcUa::BadAggregateConfigurationRejected	0x80DA0000
QOpcUa::GoodDataIgnored	0x00D90000
QOpcUa::BadRequestNotAllowed	0x80E40000
QOpcUa::GoodEdited	0x00DC0000
QOpcUa::GoodPostActionFailed	0x00DD0000
QOpcUa::UncertainDominantValueChanged	0x40DE0000
QOpcUa::GoodDependentValueChanged	0x00E00000
QOpcUa::BadDominantValueChanged	0x80E10000
QOpcUa::UncertainDependentValueChanged	0x40E20000
QOpcUa::BadDependentValueChanged	0x80E30000
QOpcUa::GoodCommunicationEvent	0x00A70000
QOpcUa::GoodShutdownEvent	0x00A80000
QOpcUa::GoodCallAgain	0x00A90000
QOpcUa::GoodNonCriticalTimeout	0x00AA0000
QOpcUa::BadInvalidArgument	0x80AB0000
QOpcUa::BadConnectionRejected	0x80AC0000
QOpcUa::BadDisconnect	0x80AD0000
QOpcUa::BadConnectionClosed	0x80AE0000
QOpcUa::BadInvalidState	0x80AF0000
QOpcUa::BadEndOfStream	0x80B00000
QOpcUa::BadNoDataAvailable	0x80B10000
QOpcUa::BadWaitingForResponse	0x80B20000
QOpcUa::BadOperationAbandoned	0x80B30000
QOpcUa::BadExpectedStreamToBlock	0x80B40000
QOpcUa::BadWouldBlock	0x80B50000
QOpcUa::BadSyntaxError	0x80B60000
QOpcUa::BadMaxConnectionsReached	0x80B70000

enum class QOpcUa::WriteMaskBitflags QOpcUa::WriteMask

This enum contains all possible bits for the WriteMask and UserWriteMask node attributes defined in OPC-UA part 3, Tabe 3.

Constant	Value	Description
QOpcUa::WriteMaskBit::None	0	No attribute is writable.
QOpcUa::WriteMaskBit::AccessLevel	(1 << 0)	The AccessLevel attribute is writable.
QOpcUa::WriteMaskBit::ArrayDimensions	(1 << 1)	The ArrayDimensions attribute is writable.
QOpcUa::WriteMaskBit::BrowseName	(1 << 2)	The BrowseName attribute is writable.
QOpcUa::WriteMaskBit::ContainsNoLoops	(1 << 3)	The ContainsNoLoops attribute is writable.
QOpcUa::WriteMaskBit::DataType	(1 << 4)	The DataType attribute is writable.
QOpcUa::WriteMaskBit::Description	(1 << 5)	The Description attribute is writable.
QOpcUa::WriteMaskBit::DisplayName	(1 << 6)	The DisplayName attribute is writable.
QOpcUa::WriteMaskBit::EventNotifier	(1 << 7)	The EventNotifier attribute is writable.
QOpcUa::WriteMaskBit::Executable	(1 << 8)	The Executable attribute is writable.
QOpcUa::WriteMaskBit::Historizing	(1 << 9)	The Historizing attribute is writable.
QOpcUa::WriteMaskBit::InverseName	(1 << 10)	The InverseName attribute is writable.
QOpcUa::WriteMaskBit::IsAbstract	(1 << 11)	The IsAbstract attribute is writable.
QOpcUa::WriteMaskBit::MinimumSamplingInterval	(1 << 12)	The MinimumSamplingInterval attribute is writable.
QOpcUa::WriteMaskBit::NodeClass	(1 << 13)	The NodeClass attribute is writable.
QOpcUa::WriteMaskBit::NodeId	(1 << 14)	The NodeId attribute is writable.
QOpcUa::WriteMaskBit::Symmetric	(1 << 15)	The Symmetric attribute is writable.
QOpcUa::WriteMaskBit::UserAccessLevel	(1 << 16)	The UserAccessLevel attribute is writable.
QOpcUa::WriteMaskBit::UserExecutable	(1 << 17)	The UserExecutable attribute is writable.
QOpcUa::WriteMaskBit::UserWriteMask	(1 << 18)	The UserWriteMask attribute is writable.
QOpcUa::WriteMaskBit::ValueRank	(1 << 19)	The ValueRank attribute is writable.
QOpcUa::WriteMaskBit::WriteMask	(1 << 20)	The WriteMask attribute is writable.
QOpcUa::WriteMaskBit::ValueForVariableType	(1 << 21)	The Value attribute of a variable type is writable.

The WriteMask type is a typedef for QFlags<WriteMaskBit>. It stores an OR combination of WriteMaskBit values.

Function Documentation

QOpcUa::ErrorCategory QOpcUa::errorCategory(QOpcUa::UaStatusCode statusCode)

Converts statusCode to an ErrorCategory. ErrorCategory can be used in cases where the exact error is not important.

For error handling dependent on status codes, the full status code must be used instead. The meaning of the status codes for the different services is documented in OPC-UA part 4.

If statusCode has not been categorized, UnspecifiedError is returned. In this case, the user must check the full status code.

[since QtOpcUa 5.14] bool QOpcUa::isSecurePolicy(const QString &securityPolicy)

Returns true if securityPolicy is a secure policy, false otherwise.

This function was introduced in QtOpcUa 5.14.

bool QOpcUa::isSuccessStatus(QOpcUa::UaStatusCode statusCode)

This method can be used to check if a call has successfully finished.

Returns true if statusCode's serverity field is Good.

[since 5.13] QOpcUa::Types QOpcUa::metaTypeToQOpcUaType(QMetaType::Type type)

Returns the Qt OPC UA type from type. In case the type does not map, QOpcUa::Undefined is returned.

This function was introduced in Qt 5.13.

QString QOpcUa::namespace0Id(QOpcUa::NodeIds::Namespace0 id)

Returns a node id string for the namespace 0 identifier id.

QOpcUa::NodeIds::Namespace0 QOpcUa::namespace0IdFromNodeId(const QString &nodeId)

Returns the enum value from QOpcUa::NodeIds::Namespace0 for nodeId.

If the node id is not in namespace 0 or doesn't have a numeric identifier which is part of the OPC Foundation's NodeIds.csv file, Unknown is returned.

If Qt OPC UA has been configured with -no-feature-ns0idnames, the check if the numeric identifier is part of the NodeIds.csv file is omitted. If the node id is in namespace 0 and has a numeric identifier, the identifier is returned regardless if it is part of the QOpcUa::NodeIds::Namespace0 enum.

QString QOpcUa::namespace0IdName(QOpcUa::NodeIds::Namespace0 id)

Returns the name of the namespace 0 node id id.

If id is unknown or Qt OPC UA has been configured with -no-feature-ns0idnames, an empty string is returned.

bool QOpcUa::nodeIdEquals(const QString &first, const QString &second)

Returns true if the two node ids first and second have the same namespace index and identifier. A node id string without a namespace index is assumed to be in namespace 0.

QString QOpcUa::nodeIdFromByteString(quint16 ns, const QByteArray &identifier)

Creates a node id string from the namespace index ns and the byte string identifier.

See also QOpcUaNode.

QString QOpcUa::nodeIdFromGuid(quint16 ns, const QUuid &identifier)

Creates a node id string from the namespace index ns and the GUID identifier.

See also QOpcUaNode.

QString QOpcUa::nodeIdFromInteger(quint16 ns, quint32 identifier)

Creates a node id string from the namespace index ns and the integer identifier.

See also QOpcUaNode.

QString QOpcUa::nodeIdFromReferenceType(QOpcUa::ReferenceTypeId referenceType)

Creates a node id string for the reference type id referenceType.

QString QOpcUa::nodeIdFromString(quint16 ns, const QString &identifier)

Creates a node id string from the namespace index ns and the string identifier.

See also QOpcUaNode.

bool QOpcUa::nodeIdStringSplit(const QString &nodeIdString, quint16 *nsIndex, QString *identifier, char *identifierType)

Splits the node id string nodeIdString in its components. The namespace index of the node id will be copied into nsIndex. The identifier string is copied into identifier and the identifier type (i, s, g, b) is copied into identifierType.

Returns true if the node id could be split successfully.

For example, "ns=1;s=MyString" is split into 1, 's' and "MyString". If no namespace index is given, ns=0 is assumed.

size_t QOpcUa::qHash(const QOpcUa::NodeAttribute &attr)

Returns a QHash key for attr.

QString QOpcUa::statusToString(QOpcUa::UaStatusCode statusCode)

Returns a textual representation of statusCode.

Currently, this is the name of the enum value but may be a real message in future releases.