Errata exists for this version of the document.

The PubSubDiagnosticsCounterType is formally defined in Table 137.

Table 137 – PubSubDiagnosticsCounterType

Attribute	Value
BrowseName	PubSubDiagnosticsCounterType
IsAbstract	False
ValueRank	-1 (-1 = ‘Scalar’)
DataType	UInt32
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of BaseDataVariableType defined in OPC 10000-5.
HasProperty	Variable	Active	Boolean	PropertyType	Mandatory
HasProperty	Variable	Classification	PubSubDiagnostics‌Counter‌Classification	PropertyType	Mandatory
HasProperty	Variable	DiagnosticsLevel	DiagnosticsLevel	PropertyType	Mandatory
HasProperty	Variable	TimeFirstChange	DateTime	PropertyType	Optional

The Value shall be reset to 0 when the Method Clear of the parent PubSubDiagnosticsType Object is called.

The Value shall be incremented by 1 for each corresponding event.

The Value shall not be incremented anymore when the maximum is reached (0xFFFFFFFF).

If the maximum is reached and a new event occurs, the SourceTimestamp of the Value shall be updated, even if the Value does not change. The Property Active indicates if the counter is active.

The Property Classification indicates whether this counter counts errors or other events according to PubSubDiagnosticsCounterClassification defined in 9.1.11.6.

The Property DiagnosticsLevel indicates the diagnostics level the counter belongs to. The DiagnosticsLevel is defined in 9.1.11.4.

The Property TimeFirstChange contains the Server time when the counter value changed from 0 to 1. If the counter value is 0 the Value is null.