FB_FTP_FileExist

FB_FTP_FileExist 1:

You can check, if a destined file exists on a FTP-Server, with this function block FB_FTP_FileExist. This function block uses an existing connection to a FTP-Server.

VAR_INPUT

VAR_INPUT
    sNetID      : T_AmsNetId    := '';
    hFTP        : T_HFTP;
    sFile       : T_MaxString   := '';
    bExecute    : BOOL;
    tTimeout    : TIME      := T#15s;
END_VAR

sNetID : Is a string containing the AMS network identifier of the target device to which the ADS command is directed.

hFTP : Handle to a FTP Server.

sFile : The name of the searched file with path.

bExecute : The command is executed with the rising edge.

tTimeout : States the time before the function is cancelled.

VAR_OUTPUT

VAR_OUTPUT
    bBusy       : BOOL;
    bError      : BOOL;
    nErrID      : UDINT;
    bExist      : BOOL;
END_VAR

bBusy : The command is in the process of being transmitted by ADS. No new command will be accepted as long as "bBusy" remains TRUE.

bError : Becomes TRUE, as soon as an error occurs.

nErrID : Supplies the ErrorCode when the bError output is set.

bExist : Becomes TRUE, if the searched file exist.

Requirements

Development environment	Target system type	PLC libraries to be linked
TwinCAT v2.10.0	PC oder CX (x86)	TcFTPClient.Lib
TwinCAT v2.10.0	CX (ARM)	TcFTPClient.Lib