Subtypes of HelpOffNormalAlarmType – OPC UA for Plastics and Rubber Machinery

27 Subtypes of HelpOffNormalAlarmType

27.1 HelpOffNormalAlarmType

The HelpOffNormalAlarmType can be used by devices, to inform the client about a Condition that is considered to be not normal. It is a subtype of the OffNormalAlarmType defined in OPC UA Part 9 and adds the Property Helptext to give some additional information to the operator.

Figure 19 – HelpOffNormalAlarmType Overview

Table 141 – HelpOffNormalAlarmType Definition

Attribute	Value
BrowseName	HelpOffNormalAlarmType
IsAbstract	False

References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of 0:OffNormalAlarmType defined in OPC UA Part 9
0:HasProperty	Variable	HelpText	0:LocalizedText	0:PropertyType	M
0:HasSubtype	ObjectType	MonitoredParameterAlarmType

Servers can use the Property HelpText also in other server specific alarms which are not derived from OffNormalAlarmType.

27.2 MonitoredParameterAlarmType

The MonitoredParameterAlarmType is a subtype of the HelpOffNormalAlarmType and is used, if the cause of the alarm is a process variable expressed as MonitoredParameterType. It adds the Variable Status. As values, the same as defined in Table 127 are used.

Table 142 – MonitoredParameterAlarmType Definition

Attribute	Value
BrowseName	MonitoredParameterAlarmType
IsAbstract	False

References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of HelpOffNormalAlarmType
0:HasComponent	Variable	Status	0:UInt16	0:MultiStateValueDiscreteType	M

The InputNode (defined in the AlarmConditionType) shall be set to the NodeId of the element of the MonitoredParameterType which causes the error (e.g. UpperTolerance2 if this value is exceeded by the ActualValue).