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();
This method has no arguments.
Method result codes in Table 51 (defined in Call service)
Table 51 – 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 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 AlarmConditionType Node. See 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 52 specifies the AddressSpace representation for the Silence Method.
Table 52 – 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 |
|
AlwaysGeneratesEvent |
ObjectType |
AuditConditionSilenceEventType |
Defined in 5.10.10 |
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ConformanceUnits |
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A & C Silencing |
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If Auditing is supported, this Method shall generate an Event of AuditConditionSilenceEventType for all invocations of the Method.