Hello and I will explain how to use TF6300 to implement a FTP client to upload file to an FTP server.It is very easy to configure and program.

Let’s go!

Installation

Please access the following link the download the function setup file.

https://www.beckhoff.com/en-en/products/automation/twincat/tfxxxx-twincat-3-functions/tf6xxx-tc3-connectivity/tf6300.html

Double the Exe file.

Choose English.

Next>.

Accept the license and Next>.

Enter the Information and Next>.

Choose Complete setup and Next>.

Next>.

Install.

Please wait a minute..

Finished.

Configuration

Here is my configuration in this tutorial. I will configure the raspberry pi4 as a FTP Server and using TwinCAT TF6300 to implement a FTP client, then transfer the text files.

Do not worry that you can see how to configure the raspberry pi4 side also.

System Requirment

Add Reference

Open your XAE and Add the Tc2_FTP library.

FB_FTP_FILEIPLOADEX

We can upload files to a FTP-Server with this function block FB_FTP_FileUpload. The connection mode”passive FTP” will be used.

VAR_INPUT

sNetID	T_AmsNetId := ”;	AMS network ID
sHost	T_IPv4Addr := ‘127.0.0.1’;	A string containing the IPv4 address of the FTP-Server.
nPort	UDINT:= 21;	FTP port (default 21).
sUsername	STRING := ”;	Username for the FTP Server authentication
sPassword	STRING := ”;	Password for the FTP Server authentication
sSrcFile	T_MaxString := ”;	Source file which will be copied to the FTP Server.
sDesFile	T_MaxString := ”;	Path and name of the destination file on the FTP Server
bExecute	BOOL	The command is executed with the rising edge.
tTimeout	TIME := T#15s;	States the time before the function is cancelled.

VAR_OUTPUT

bBusy	BOOL	True=FB is executing, no new command can be received.
bError	BOOL	True=Error
nErrID	UDINT	The Error information
nProgress	UDINT	current status of the data transmission

Raspberry Setup

Now we will configure the Raspberry pi as the FTP Server.

Install vsftpd

The vsftpd package is used here.

Please update your pi4 and install that package.

sudo apt-get update
sudo apt-get install vsftpd

Edit vsftpd.conf

open the .conf file.

sudo nano /etc/vsftpd.conf

uncomment the following setting.

anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
chroot_local_user=YES

add these line in the end of your .conf file.

user_sub_token=$USER
local_root=/home/$USER/ftp

FTP Directory for Pi User

create a ftp directory for pi users.

mkdir /home/pi/ftp
mkdir /home/pi/ftp/files

Change the permission of that directory.

chmod a-w /home/pi/ftp

Restart

Restart your FTP Server and Finish!

sudo service vsftpd restart

Server test

FileZilla is used in this tutorial to test the connection between Server and Client.

https://filezilla-project.org/download.php?type=client#close

if the connection is established, the following message is shown.

Program

Now we will implement the program to upload the file to FTP Server and here is the class diagram.

File to Raspberry

This is the file that I planned to upload to FTP Server.

FTPFIleUpload(
bExecute:=bSend
);

Send:=16#0;
IF FTPFIleUpload.bBusy THEN
Send:=16#1;
END_IF
IF FTPFIleUpload.bError THEN
Send:=16#2;
END_IF

MAIN

VAR

VAR
FTPUpload:FB_FTPClient;
bSend:BOOL;
END_VAR

Code

FTPUpload.UserName:=’pi’;
FTPUpload.Password:=’raspberry’;
FTPUpload.Host:=’192.168.3.14′;
FTPUpload.Port:=DEFAULT_FTP_PORT;
FTPUpload.SrcFilePath:=’C:\FTPFiles\text.txt’;
FTPUpload.DestFilePath:=’/files/text.txt’;
FTPUpload();
FTPUpload.Send(bSend);