The ExclusiveDeviationAlarmType is utilized with multiple mutually exclusive limits. It is formally defined in Table 102.

Table 102 – ExclusiveDeviationAlarmType definition

Attribute	Value
BrowseName	ExclusiveDeviationAlarmType
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	Modelling Rule
Inherits the Properties of the ExclusiveLimitAlarmType defined in clause 5.8.19.3.
HasProperty	Variable	SetpointNode	NodeId	PropertyType	Mandatory
HasProperty	Variable	BaseSetpointNode	NodeId	PropertyType	Optional
ConformanceUnits
A & C Exclusive Deviation

The SetpointNode Property provides the NodeId of the set point used in the Deviation calculation. If this Variable is not in the AddressSpace, a NULL NodeId shall be provided.

The BaseSetpointNode Property provides the NodeId of the original or base setpoint. The value of this node is the value of the set point to which an AdaptiveAlarm can be reset if any algorithmic changes need to be discarded. The value of this node usually contains the originally configured set point.