LinkedListGetFirst Function

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The LinkedListGetFirst Function removes the first entry of a LinkedList Data Object.


Informal Syntax:

LinkedListGetFirst( LinkedListID )

Formal Syntax:

LinkedListGetFirst( LinkedListID:=Expression )


The LinkedListGetFirst Function has these parameters.

Parameter Type Description
LinkedListID DINT The identifier of the LinkedList Data Object.

Return Value

The return value does not have a type. Use a Type Cast to convert the return value. For example:

TO_STRING( LinkedListGetFirst( LinkedListID ) )


The function reports a runtime error if:

Standards Compliance

The LinkedListGetFirst Function is an extension to the IEC 61131-3 standard.

Further Information

LinkedList Functions

For information about functions to manage LinkedList data objects.

Data Objects

For information about all Data Objects supported by Fernhill SCADA.

IEC 61131-3

To learn how IEC 61131-3 is used in Fernhill SCADA.


For the meaning of terms used in Fernhill SCADA.