Industrial Automation - Basics - 5.2.5 StackElementType

Figure 5 StackElementType overview

The StackElementType is the base class for elements in a stacklight. The elements are used in an ordered list. In Figure 5, a graphical overview is given. It is formally defined in Table 19.

Table 19 – StackElementType Definition

Attribute	Value
BrowseName	StackElementType
IsAbstract	True
Description	Base class for elements in a stacklight.
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the BaseObjectType defined in OPC 10000-5 i.e. inheriting the InstanceDeclarations of that Node.
0:HasInterface	ObjectType	0:IOrderedObjectType
0:HasProperty	Variable	SignalOn	0:Boolean	0:PropertyType	O
0:HasProperty	Variable	IsPartOfBase	0:Boolean	0:PropertyType	O
0:HasProperty	Variable	0:NumberInList	0:UInteger	0:PropertyType	M

SignalOn indicates if the signal emitted by the stack element is currently switched on or not.

IsPartOfBase indicates, if the element is contained in the mounting base of the stacklight. All elements contained in the mounting base shall be at the beginning of the list of stack elements.

NumberInList is defined in the IOrderedObjectType and used in conjunction with the HasOrderedComponent Reference of the BasicStacklightType. It shall contain the same ordering information as the Reference and enumerate the stacklight elements counting upwards beginning from the base of the stacklight.

The InstanceDeclarations of the StackElementType have the Attribute values defined in Table 20.

Table 20 – StackElementType Attribute values for child Nodes

Source Path	Value	Description
SignalOn	-	Indicates if the signal emitted by the stack element is currently switched on or not.
IsPartOfBase	-	Indicates, if the element is contained in the mounting base of the stacklight. All elements contained in the mounting base shall be at the beginning of the list of stack elements.
0:NumberInList	-	Enumerate the stacklight elements counting upwards beginning from the base of the stacklight.