Mining - General - 8 OPC UA VariableTypes

The VariableTypes StructuredArrayItemType and LongwallShieldOffsetArrayItemType contain the necessary properties to support the traits of the introduced mining equipment. The relation between these two VariableTypes is displayed in Figure 11.

Figure 11 – VariableTypes Overview

The StructuredArrayItemType VariableType is a subtype of the DataItemType. It is formally defined in Table 17.

Table 17 – StructuredArrayItemType Type Definition

Attribute		Value
BrowseName		StructuredArrayItemType
IsAbstract		True
ValueRank		0
DataType		0:BaseDataType
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the 0:DataItemType defined in OPC 10000-5.
0:HasProperty	Variable		EngineeringUnits	0:EUInformation	0:PropertyType	O, RW
0:HasProperty	Variable		EURange	0:Range	0:PropertyType	O, RW
0:HasProperty	Variable		InstrumentRange	0:Range	0:PropertyType	O, RW

The LongwallShieldOffsetArrayItemType VariableType is a subtype of the StructuredArrayItemType. It is formally defined in Table 18 .

Table 18 – LongwallShieldOffsetArrayItemType Type Definition

Attribute		Value
BrowseName		LongwallShieldOffsetArrayItemType
IsAbstract		False
ValueRank		1
DataType		LongwallShieldOffsetDataType
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the StructuredArrayItemType defined in Chapter 8.2
0:HasProperty	Variable		0:EngineeringUnits	0:EUInformation	PropertyType	M, RW
0:HasProperty	Variable		0:EURange	0:Range	PropertyType	M, RW

NOTE:The LongwallShieldOffsetArrayItemType is a VariableType, which is only used in OPC 40567-2. When the OPC 40567-2 is revised, this VariableType will be added there. If a major revision of the OPC 40560 is done in the future, the LongwallShieldOffsetArrayItemType will be removed here. For this reason, it is already recommended not to use this VariableType in an implementation.