UA_NodeGetHandleList

This function block queries node handles for nodes in the UA namespace.

Inputs

VAR_INPUT
    Execute          : BOOL;
    ConnectionHdl    : DWORD;
    NodeIDCount      : UINT;
    NodeIDs          : ARRAY[1..nMaxNodeIDsInList] OF ST_UANodeID;
    Timeout          : TIME := DEFAULT_ADS_TIMEOUT;    
END_VAR

Name	Type	Description
Execute	BOOL	The command is triggered by a rising edge at this input.
ConnectionHdl	DWORD	Connection handle previously output by the function block UA_Connect.
NodeIDCount	UINT	Number of nodes for which a node handle is required.
NodeIDs	ARRAY	Array of NodeIDs created with struct ST_UANodeID.
Timeout	TIME	Time until the function is aborted. DEFAULT_ADS_TIMEOUT is a global constant, set to 5 seconds.

Outputs

VAR_OUTPUT
    NodeHdls     : ARRAY[1..nMaxNodeIDsInList] OF DWORD;
    NodeErrorIDs : ARRAY[1..nMaxNodeIDsInList] OF DWORD;
    cbData_R     : UDINT;
    Done         : BOOL;
    Busy         : BOOL;
    Error        : BOOL;
    ErrorID      : DWORD;
END_VAR

Name	Type	Description
NodeHdls	ARRAY	Array of requested node handles.
NodeErrorIDs	ARRAY	Array of error IDs if no node handles are available.
cbData_R	UDINT	Size of the data read.
Done	BOOL	Switches to TRUE if the function block was executed successfully.
Busy	BOOL	TRUE until the function block has executed a command, at the most for the duration of the "Timeout" at the input. The inputs accept no new command as long as Busy = TRUE. It is not the connection time that is monitored but the reception time.
Error	BOOL	Switches to TRUE if an error occurs while executing a command. The command-specific error code is in nErrID.
ErrorID	DWORD	Contains the error ID if an error occurs.

Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT 3.1	Win32, Win64, CE-X86, CE-Arm®	Tc3_PLCopen_OpcUa