Performance data
2.8 Characteristic data for FTP / FTPS mode
CP 443-1 Advanced (GX30)
36 Manual, 03/2019, C79000-G8976-C256-05
To send emails, precisely one email connection must be set up per CP. The e-mail
connection specifies the mail server of the e-mail provider via which all the mails sent by the
Advanced CP are delivered.
To send e-mail in the user program of the S7-CPU, use the send call of the SEND/RECEIVE
interface (FC AG_SEND).
The maximum data length is 8192 bytes.
The CP supports the following authentication methods:
● PLAIN
● LOGIN
● CRAM-MD5
● DIGEST-MD5
For more detailed information, refer to the manual /2/ (Page 118).
If your service provider requires authentication, you need to import the certificate you
received from your service provider into the CP to authenticate the CP with the server. For
the procedure, refer to the section Importing certificates for SMTP with STARTTLS or FTPS
(Page 82)
Characteristic data for FTP / FTPS mode
TCP connections for FTP/FTPS
FTP actions are transferred from the CP over TCP connections. Depending on the mode, the
following characteristic data applies:
● FTP in client mode:
You can configure a maximum of 20 FTP connections. Up to 2 TCP connections are
occupied per configured FTP connection.
● FTP in server mode:
You can operate a maximum of 10 FTP sessions at the same time. Up to 2 TCP
connections are occupied per FTP session (1 control connection and 1 data connection).
If you use FTPS with authentication, you need to import the certificate you received from
your service provider into the CP to authenticate the CP with the server. For the procedure,
refer to the section Importing certificates for SMTP with STARTTLS or FTPS (Page 82)
Program block FTP_CMD (FB40) for FTP client mode
For communication via a TCP connection configured with the "Use FTP protocol" option, use
the FTP program block FTP_CMD (FB40).
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