PLC Connection
Posted: 2022-06-09 07:50
Hi,
I have been testing the Siemens Implementation of the LFTP-Client with FileZilla Server V1.4.1.
The PLC used is an S7-1515F (6ES7 515-2FM01-0AB0) - the PLC is also directly connected to my laptop where the Server is running.
So there should be no issues with firewalls or ports.
I can connect to the server without problems, but every time I try to upload a file, the server runs into an error (425) after the PLC closes the data-connection. Although the server has encountered an error, the file has been successfully uploaded, so I don't know exactly what the problem is.
Now comes the tricky part - the TCP-implementation on the Siemens side.
As I have to use an older version of the siemens software (TIA Portal V15.1) the PLC always closes the TCP-connection with the "RST"-Flag instead of the correct "FIN"-Flag.
I know that this is a siemens issue, but I would like to know if this causes the error on the server side? With a newer version and the correct TCP termination, the server has no errors after uploading the file.
Is there maybe a setting on the server side where I can "allow" the termination of the connection with the "RST"-Flag?
Best Regards,
Michael
I have been testing the Siemens Implementation of the LFTP-Client with FileZilla Server V1.4.1.
The PLC used is an S7-1515F (6ES7 515-2FM01-0AB0) - the PLC is also directly connected to my laptop where the Server is running.
So there should be no issues with firewalls or ports.
I can connect to the server without problems, but every time I try to upload a file, the server runs into an error (425) after the PLC closes the data-connection. Although the server has encountered an error, the file has been successfully uploaded, so I don't know exactly what the problem is.
Now comes the tricky part - the TCP-implementation on the Siemens side.
As I have to use an older version of the siemens software (TIA Portal V15.1) the PLC always closes the TCP-connection with the "RST"-Flag instead of the correct "FIN"-Flag.
I know that this is a siemens issue, but I would like to know if this causes the error on the server side? With a newer version and the correct TCP termination, the server has no errors after uploading the file.
Is there maybe a setting on the server side where I can "allow" the termination of the connection with the "RST"-Flag?
Best Regards,
Michael