Siemens SIMATIC NET CP 243-1 IT Technical Manual page 28

Features and Functions
All types of files can be transferred to the file system of the CP 243-1 IT. Rele-
vance of these files to operation of the CP 243-1 IT is not checked.
Caution
BINARY-type transmission should be used to transfer files between the FTP server
of the CP 243-1 IT and a geographically remote FTP client. The transmission type
must be set on the FTP client side.
Note
Since the CP 243-1 IT does not provide the time, the files stored on or read from
the CP 243-1 IT via FTP all have the date 01.01.1980 and the time 00:00.
Access protection
FTP is a protocol for which the user must authenticate himself before gaining ac-
cess to the FTP server. This requires a user name and a password which is valid
on the server. After a connection between the FTP client and the FTP server of the
CP 243-1 IT is established, the user name and related password must be entered.
After successful authentication, the user can then access the file system of the CP
243-1 IT. He can move through the directory tree, transmit files and manage direc-
tories.
Up to 8 users as well as an administrator can be configured for the CP 243-1 IT.
The administrator is distinguished from the up to 8 users with special rights and the
location at which the fixed user name and the related password are stored.
The user names and passwords are configured with STEP 7 Micro/WIN 32. The
configuration file created by the Internet wizard to be used here is transferred with
FTP to the CP 243-1 IT and stored permanently in the file system there in a file
with the ending .udb. The user name and the password of the administrator are re-
quired before the user configuration can be transferred to the CP 243-1 IT.
Note
The CP 243-1 IT does not support an FTP access without specification of a user
name or password.
Auto logout
Simultaneous access of several FTP clients to the FTP server of the CP 243-1 IT is
not supported.
The FTP server is equipped with an auto logout routine to prevent it from being
blocked by an undefined connection termination of an FTP client.
If the FTP server located on the CP 243-1 IT is connected with an FTP client and a
second FTP client wants to establish a connection to the FTP server, the server
checks to determine whether there was FTP-based communication between it and
the first FTP client during the last 60 seconds. If not, the connection to the fist FTP
client is disconnected and the second FTP client's request to establish a connec-
tion is accepted. Otherwise, the connection to the first FTP client is continued and
the second FTP client's request for a connection is rejected.
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03/03
CP 243-1 IT
J31069-D0429-U001-A0-7618