FB_XmlSrvRead

VAR_INPUT

VAR_INPUT
    sNetId      : T_AmsNetId; 
    ePath       : E_OpenPath := PATH_GENERIC; 
    nMode       : WORD := XMLSRV_SKIPMISSING;
    pSymAddr    : DWORD;
    cbSymSize   : UDINT;
    sFilePath   : T_MaxString;
    sXPath      : T_MaxString;
    bExecute    : BOOL; 
    tTimeout    : TIME := T#60s; 
END_VAR

sNetId: String containing the network address of the TwinCAT 3 XML server. For the local computer (default) an empty string may be specified.

ePath: This input can be used to select a TwinCAT system path on the target device for opening the file.

nMode: This input can be used to control how the XML file is evaluated. Only the mode XMLSRV_SKIPMISSING is initially supported for the command XmlSrvRead.

pSymAddr: Address of the PLC variable to which the data from the XML file are to be written.

cbSymSize: Size of the PLC variable to which the data from the XML file are to be written.

sFilePath: Contains the path and file name for the file to be opened. The path can only point to the local computer’s file system! This means that network paths cannot be used here!

sXPath: Contains the address of the tag in the XML document from which the data are to be written. The address must be a valid XPath instruction. The name of the tag must be different from the name of the symbol.

bExecute: The block is activated by a positive edge at this input.

tTimeout: Maximum time allowed for the execution of the function block.

VAR_OUTPUT

VAR_OUTPUT
    bBusy   : BOOL;
    bError  : BOOL;
    nErrId  : UDINT;
END_VAR

bBusy: This output is set when the function block is activated. It remains set until feedback is received.

bError: This output is set up after the bBusy output has been reset if there has been an error in transmission of the command.

nErrId: Returns the TC3 XML server error number, if a bError output is set.

Requirements