UA_NodeGetHandle

This function block queries a node handle for a given symbol in the UA namespace. The symbol is specified by a connection handle and its node ID.

Inputs

VAR_INPUT
    Execute       : BOOL;
    ConnectionHdl : DWORD;
    NodeID        : 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.
Node ID	ST_UANodeID	Unique addressing of the UA node, consisting of Identifier, IdentifierType and NamespaceIndex, which are resolved from a NamespaceName, e.g. by means of the method UA_GetNamespaceIndex.
Timeout	TIME	Time until the function is aborted. DEFAULT_ADS_TIMEOUT is a global constant, set to 5 seconds.

Outputs

VAR_OUTPUT
    NodeHdl     : DWORD;
    Done        : BOOL;
    Busy        : BOOL;
    Error       : BOOL;
    ErrorID     : DWORD;
END_VAR

Name	Type	Description
NodeHdl	DWORD	Node handle that can be used for other function blocks, such as UA_Read or UA_Write.
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 do not accept new commands as long as Busy is 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 included in ErrorID.
ErrorID	DWORD	Contains the command-specific ADS error code of the most recently executed command.

Requirements

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