This ObjectType is a subtype of FolderType and is used to identify the operation limits of the OPC UA Server. It is formally defined in Table 19.

Table 19 – OperationLimitsType definition

Attribute	Value
BrowseName	OperationLimitsType
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the FolderType defined in 6.6, which means it inherits the InstanceDeclarations of that Node.
HasProperty	Variable	MaxNodesPerRead	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerHistoryReadData	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerHistoryReadEvents	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerWrite	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerHistoryUpdateData	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerHistoryUpdateEvents	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerMethodCall	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerBrowse	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerRegisterNodes	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerTranslateBrowsePathsToNodeIds	UInt32	PropertyType	Optional
HasProperty	Variable	MaxNodesPerNodeManagement	UInt32	PropertyType	Optional
HasProperty	Variable	MaxMonitoredItemsPerCall	UInt32	PropertyType	Optional
Conformance Units
Base Info ServerType

Any operational limits Property that is provided shall have a non zero value.

The MaxNodesPerRead Property indicates the maximum size of the nodesToRead array when a Client calls the Read Service.

The MaxNodesPerHistoryReadData Property indicates the maximum size of the nodesToRead array when a Client calls the HistoryRead Service using the historyReadDetails RAW, PROCESSED, MODIFIED, or ATTIME.

The MaxNodesPerHistoryReadEvents Property indicates the maximum size of the nodesToRead array when a Client calls the HistoryRead Service using the historyReadDetails EVENTS.

The MaxNodesPerWrite Property indicates the maximum size of the nodesToWrite array when a Client calls the Write Service.

The MaxNodesPerHistoryUpdateData Property indicates the maximum size of the historyUpdateDetails array supported by the Server when a Client calls the HistoryUpdate Service.

The MaxNodesPerHistoryUpdateEvents Property indicates the maximum size of the historyUpdateDetails array when a Client calls the HistoryUpdate Service.

The MaxNodesPerMethodCall Property indicates the maximum size of the methodsToCall array when a Client calls the Call Service.

The MaxNodesPerBrowse Property indicates the maximum size of the nodesToBrowse array when calling the Browse Service or the continuationPoints array when a Client calls the BrowseNext Service.

The MaxNodesPerRegisterNodes Property indicates the maximum size of the nodesToRegister array when a Client calls the RegisterNodes Service and the maximum size of the nodesToUnregister when calling the UnregisterNodes Service.

The MaxNodesPerTranslateBrowsePathsToNodeIds Property indicates the maximum size of the browsePaths array when a Client calls the TranslateBrowsePathsToNodeIds Service.

The MaxNodesPerNodeManagement Property indicates the maximum size of the nodesToAdd array when a Client calls the AddNodes Service, the maximum size of the referencesToAdd array when a Client calls the AddReferences Service, the maximum size of the nodesToDelete array when a Client calls the DeleteNodes Service, and the maximum size of the referencesToDelete array when a Client calls the DeleteReferences Service.

The MaxMonitoredItemsPerCall Property indicates

• the maximum size of the itemsToCreate array when a Client calls the CreateMonitoredItems Service,
• the maximum size of the itemsToModify array when a Client calls the ModifyMonitoredItems Service,
• the maximum size of the monitoredItemIds array when a Client calls the SetMonitoringMode Service or the DeleteMonitoredItems Service,
• the maximum size of the sum of the linksToAdd and linksToRemove arrays when a Client calls the SetTriggering Service.