F_CreateLinkedListHnd
The function initialises the Linked List Handle. The List Handle must be initialised once by calling the F_CreateLinkedListHnd function.
FUNCTION F_CreateLinkedListHnd : BOOL
VAR_INPUT
VAR_INPUT
pEntries : POINTER TO T_LinkedListEntry := 0; (* Pointer to the first linked list node (element array) *)
cbEntries : UDINT := 0; (* Byte size (length) of linked list node array *)
END_VAR
pEntries: The address of the first T_LinkedListEntry array element. The address can be determined with the ADR operator.
cbEntries: The size of the T_LinkedListEntry array in bytes. The byte size can be determined with the SIZEOF operator.
VAR_IN_OUT
VAR_IN_OUT
hList : T_HLINKEDLIST;(* Linked list handle *)
END_VAR
hList: Hash table handle to be initialized. The handle is required for accessing the list from the function block FB_LinkedListCtrl.
Return parameter | Description |
|---|---|
TRUE | No error |
FALSE | Error |
Example: See the documentation for the FB_LinkedListCtrl function block.
Requirements
Development environment | Target system type | PLC libraries to include |
|---|---|---|
TwinCAT v2.10.0 Build >= 1339 | PC or CX (x86, ARM) | TcUtilities.Lib |