This is a subtype of AlarmGroupType that can be used to suppress other alarms. This subtype of AlarmGroup extends the AlarmGroupType to allow the addition of Variables that have a Boolean DataType. The Variable can be thought of as representing the Id of the ActiveState of an Alarm, i.e. when any of the included Variables have a value of true the AlarmSuppressionGroup is active.

Table 45 – AlarmSuppressionGroupType definition

Attribute	Value
BrowseName	AlarmSuppressionGroupType
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the AlarmGroupType
AlarmSuppressionGroupMember	Variable	<DigitalVariable>	Boolean	BaseDataVariableType	OptionalPlaceholder
ConformanceUnits
A & C Suppression Group

The instance of an AlarmSuppressionGroupType should be given a name and description that describes the purpose of the Alarm group.

The AlarmSuppressionGroupType instance will contain a list of instances of AlarmConditionType or sub type of AlarmConditionType or BaseDataVaribleType with a DataType of Boolean referenced by AlarmSuppressionGroupMember references. At least one Node must be present in an instance of an AlarmGroupType.