TheUnsuppress Methodis used to clear the SuppressedStateof a specific Alarminstance. It is only available on an instance of an AlarmConditionTypethat also exposes the SuppressedState. This Methodcan be used to overwrite any suppression cause by an associated AlarmSuppressionGroup. This Methodworks in parallel with any suppression triggered by an AlarmSuppressionGroup, in that if the Methodis used to clear the SuppressedStateof an Alarm, any change in an AlarmSuppressionGroup might again suppress the Alarm.

Normally, the NodeIdof the ObjectInstance is passed as the ObjectIdto the Call Service. However, some Serversdo not expose Conditioninstances in the AddressSpace. Therefore, Serversshall allow Clientsto call the Unsuppress Methodby specifying ConditionIdas the ObjectId.The Methodcannot be called with an ObjectIdof the AlarmConditionType Node.

Signature

Unsuppress();

Method Result Codes in Table 43(defined in Call Service)

Table 45– Unsuppress result codes

Result Code

Description

Bad_MethodInvalid

The MethodIdprovided does not correspond to the ObjectIdprovided. See OPC 10000-4for the general description of this result code.

Bad_NodeIdInvalid

Used to indicate that the specified ObjectIdis not valid or that the Methodwas called on the ConditionType Node.

See OPC 10000-4for the general description of this result code.

Comments

Unsuppress Methodapplies to an Alarminstance, even if it is not currently active.

Table 44specifies the AddressSpacerepresentation for the Suppress Method.

Table 46– Unsuppress Method AddressSpace definition

Attribute

Value

BrowseName

Unsuppress

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

AlwaysGeneratesEvent

ObjectType

AuditConditionSuppressionEventType

Defined in 5.10.4