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5.7 Acknowledgeable Condition Model ToC Previous Next

5.7.4 Confirm Method ToC Previous Next

The Confirm Method is used to confirm an Event Notifications for a Condition instance state where ConfirmedState is False. Normally, the NodeId of the object instance is passed as the ObjectId to the Call Service. However, some Servers do not expose Condition instances in the AddressSpace. Therefore, Servers shall allow Clients to call the Confirm Method by specifying ConditionId as the ObjectId. The Method cannot be called with an ObjectId of the AcknowledgeableConditionType Node.

Signature

Confirm(
[in] ByteString		EventId
[in] LocalizedText	Comment
);

The parameters are defined in Table 32

Table 32 – Confirm Method parameters

Argument Description
EventId EventId   identifying a particular Event Notification.
Only Event Notifications where the Id property of the ConfirmedState is False can be confirmed.
Comment A localized text to be applied to the Conditions.

Method result codes in Table 33 (defined in Call Service)

Table 33 – Confirm result codes

Result Code Description
Bad_ConditionBranchAlreadyConfirmed See Table 103 for the description of this result code.
Bad_MethodInvalid The method id does not refer to a method for the specified object or ConditionId.
See OPC 10000-4 for the general description of this result code.
Bad_EventIdUnknown See Table 103 for the description of this result code.
Bad_NodeIdUnknown Used to indicate that the specified ObjectId is not valid or that the Method was called on the ConditionType Node.
See OPC 10000-4 for the general description of this result code.

Comments

A Server is responsible to ensure that each Event has a unique EventId. This allows Clients to identify and confirm a particular Event Notification.

The EventId identifies a specific Event Notification where a state to be confirmed was reported. A Comment can be provided which will be applied to the state identified with the EventId.

A valid EventId will result in an Event Notification where ConfirmedState/Id is set to True and the Comment Property contains the text of the optional comment argument. If a previous state is confirmed, the BranchId and all Condition values of this branch will be reported. A Client can confirm only events that have a ConfirmedState/Id set to False. The logic for setting ConfirmedState/Id to False is Server specific and may even be event or condition specific.

Table 34 specifies the AddressSpace representation for the Confirm Method.

Table 34 – Confirm Method AddressSpace definition

Attribute Value
BrowseName Confirm
References NodeClass BrowseName DataType TypeDefinition ModellingRule
HasProperty Variable InputArguments Argument[] PropertyType Mandatory
AlwaysGeneratesEvent ObjectType AuditConditionConfirmEventType Defined in 5.10.7
   

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