SetSubscriptionDurable Method is used to set a Subscription into a mode where MonitoredItem data and event queues are stored and delivered even if an OPC UA Client was disconnected for a longer time or the OPC UA Server was restarted. Its intended use is defined in OPC 10000-4.

Signature

SetSubscriptionDurable(

[in] UInt32 subscriptionId

[in] UInt32 lifetimeInHours

[out] UInt32 revisedLifetimeInHours

);

Argument

Description

subscriptionId

Identifier of the Subscription.

lifetimeInHours

The requested lifetime in hours for the durable Subscription.

revisedLifetimeInHours

The revised lifetime in hours the Server applied to the durable Subscription.

Method Result Codes (defined in Call Service)

Result Code

Description

Bad_SubscriptionIdInvalid

Defined in OPC 10000-4

Bad_InvalidState

Defined in OPC 10000-4

This is returned when a Subscription already contains MonitoredItems.

Bad_UserAccessDenied

Defined in OPC 10000-4

The Method was not called in the context of the Session that owns the Subscription.

Table 116 specifies the AddressSpace representation for the SetSubscriptionDurable Method.

Table 116 – SetSubscriptionDurable Method AddressSpace definition

Attribute

Value

BrowseName

SetSubscriptionDurable

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

HasProperty

Variable

InputArguments

Argument[]

PropertyType

Mandatory

HasProperty

Variable

OutputArguments

Argument[]

PropertyType

Mandatory

Conformance Units

Base Info ServerType