5 Model

5.8 Alarm model

5.8.19 NonExclusiveLimitAlarmType

The NonExclusiveLimitAlarmType is used to specify the common behaviour for Alarm Types with multiple non-exclusive limits. The NonExclusiveLimitAlarmType is illustrated in Figure 20.

Figure 20 – NonExclusiveLimitAlarmType

The NonExclusiveLimitAlarmType is formally defined in Table 95 and Table 96.

Table 95 – NonExclusiveLimitAlarmType definition

Attribute	Value
BrowseName	NonExclusiveLimitAlarmType
IsAbstract	False

Subtype of the LimitAlarmType defined in clause 5.8.17.

References	NodeClass	BrowseName	DataType	TypeDefinition	Modelling Rule
HasSubtype	ObjectType	NonExclusiveLevelAlarmType	Defined in Clause 5.8.20.2
HasSubtype	ObjectType	NonExclusiveDeviationAlarmType	Defined in Clause 5.8.21.2
HasSubtype	ObjectType	NonExclusiveRateOfChangeAlarmType	Defined in Clause 5.8.22.2
HasComponent	Variable	HighHighState	LocalizedText	TwoStateVariableType	Optional
HasComponent	Variable	HighState	LocalizedText	TwoStateVariableType	Optional
HasComponent	Variable	LowState	LocalizedText	TwoStateVariableType	Optional
HasComponent	Variable	LowLowState	LocalizedText	TwoStateVariableType	Optional
ConformanceUnits
A & C Non-Exclusive Limit

Table 96 – NonExclusiveLimitAlarmType Additional Subcomponents

BrowsePath	References	NodeClass	BrowseName	DataType	TypeDefinition	Others
HighHighState	HasProperty	Variable	TrueState	LocalizedText	PropertyType	X
HighHighState	HasProperty	Variable	FalseState	LocalizedText	PropertyType	X
HighState	HasProperty	Variable	TrueState	LocalizedText	PropertyType	X
HighState	HasProperty	Variable	FalseState	LocalizedText	PropertyType	X
LowState	HasProperty	Variable	TrueState	LocalizedText	PropertyType	X
LowState	HasProperty	Variable	FalseState	LocalizedText	PropertyType	X
LowLowState	HasProperty	Variable	TrueState	LocalizedText	PropertyType	X
LowLowState	HasProperty	Variable	FalseState	LocalizedText	PropertyType	X

HighHighState, HighState, LowState, and LowLowState represent the non-exclusive states. As an example, it is possible that both HighState and HighHighState are in their True state. Vendors may choose to support any subset of these states. Recommended state names are described in 0.

Four optional limits are defined that configure these states. At least the HighState or the LowState shall be provided even though all states are optional. It is implied by the definition of a HighState and a LowState, that these groupings are mutually exclusive. A value cannot exceed both a HighState value and a LowState value simultaneously.