Siemens CP 243-1 IT, Техническое руководство

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Features and Functions 03/03
CP 243-1 IT
J31069-D0429-U001-A0-7618
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With the help of the FTP client, it is possible to delete files in the file system of an
FTP server from the local S7-200 system.
During the transmission with FTP, the files to be exchanged are not changed and
the data therein are not converted. All data to be transferred are treated as if they
were in byte format. The data to be written are stored by byte in the specified file.
The FTP client of the CP 243-1 IT always initiates the file transfer, triggered by the
S7-200 user program. An FTP server itself does not generate FTP requests.
The CP 243-1 IT only accepts one FTP client request from the S7-200 user pro-
gram at a time. As soon as this is completely processed, the CP 243-1 IT prepares
a positive or negative acknowledgment. Not until this happens can the S7-200 user
program issue a new FTP client job.
The FTP servers specified in the configuration with their IP address must be lo-
cated in the subnetwork of the CP 243-1 IT or must be accessible via a gateway.
Caution
The data transferred from or to the memory of the S7-200 CPU via FTP are trans-
mitted in binary mode. There is no conversion or formatting of these data. The data
to be transferred are not stored permanently on the CP 243-1 IT.
Configuration
The FTP jobs are configured with the Internet wizard of STEP 7 Micro/WIN 32. The
configuration data entered here are permanently stored in the file system of the CP
243-1 IT in a file with the ending .fdb. Transmission of these data from the system
on which the configuration was prepared with STEP 7 Micro/WIN 32 to the CP 243-
1 IT is handled via FTP.
Up to 32 FTP jobs can be predefined with one file transaction each. Each of these
jobs is described with the following parameter record.
− FTP job number
Every configured FTP job can be referenced from the S7-200 user program
with this number.
− IP address on the FTP server
IP address of the system whose file system is to be accessed
− User name on the FTP server
The login on the FTP server takes place under this name. This means that
the name specified here must have access rights for the addressed FTP
server.
− Password for on the FTP server
The encrypted password specified here is used to log in on the FTP server.
− Path name of the applicable file
The file name including the complete path must be specified here.
− Job type to be executed. Possible job types are:
− Write to file system of the FTP server
− Read from file system of the FTP server
− Delete files from file system of the FTP server