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

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

Signature

Suppress();

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

Table 43– Suppress result codes

Result Code

Description

Bad_MethodInvalid

The MethodIdprovided does not correspond to the ObjectId provided. 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

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

Table 44specifies the AddressSpacerepresentation for the Suppress Method.

Table 44– Suppress Method AddressSpace definition

Attribute

Value

BrowseName

Suppress

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

AlwaysGeneratesEvent

ObjectType

AuditConditionSuppressionEventType

Defined in 5.10.4