Errata exists for this version of the document.
The Silence Method is used silence a specific Alarm instance. It is only available on an instance of an AlarmConditionType that also exposes the SilenceState. 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 Silence Method by specifying ConditionId as the ObjectId. The Method cannot be called with an ObjectId of the AlarmConditionType Node.
Signature
Silence();
The parameters are defined in Table 40
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Argument |
Description |
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Method result codes in Table 41 (defined in Call service)
Table 41 – Silence result codes
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Result Code |
Description |
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Bad_MethodInvalid |
The MethodId provided does not correspond to the ObjectId provided. See OPC 10000-4 for the general description of this result code. |
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Bad_NodeIdInvalid |
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
If the instance is not currently in an audible state, the command is ignored.
Table 42 specifies the AddressSpace representation for the Silence Method.
Table 42 – Silence Method AddressSpace definition
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Attribute |
Value |
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BrowseName |
Silence |
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References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
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AlwaysGeneratesEvent |
ObjectType |
AuditConditionSilenceEventType |
Defined in 5.10.10
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