UA_MethodGetHandle

This function block collects a handle for a UA method, which can then be used to call a method using UA_MethodCall.

Inputs

VAR_INPUT
    Execute          : BOOL;
    ConnectionHdl    : DWORD;
    ObjectNodeID     : ST_UANodeID;
    MethodNodeID     : 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.
ObjectNodeID	ST_UANodeID	Object node ID of the method to be called. (Type: ST_UANodeID).
MethodNodeID	ST_UANodeID	Method node ID of the method to be called. Corresponds to the ID attribute in the UA namespace. (Type: UA_Connect).
Timeout	TIME	Time until the function is aborted. DEFAULT_ADS_TIMEOUT is a global constant, set to 5 seconds.

Outputs

VAR_OUTPUT
    MethodHdl   : DWORD;
    Done        : BOOL;
    Busy        : BOOL;
    Error       : BOOL;
    ErrorID     : UDINT;
END_VAR

Name	Type	Description
MethodHdl	DWORD	Returns a method handle that can be used to call a method via UA_MethodCall.
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 contained in nErrID.
ErrorID	UDINT	Contains the command-specific 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