Siemens CP 443-1 User Manual

5 Performance Data
B4A−36
CP 443-1 Advanced for Industrial Ethernet / Manual Part B4A
Release 01/2007
C79000-G8976-C193-06
5.7 Characteristic Data HTTP and FTP Operation
TCP Connections for FTP
FTP actions are transferred from the CP over TCP connections. Depending on the
mode, the following characteristic data apply:
S FTP in client mode:
Per configured FTP connection, up to 2 TCP connections are occupied; a
maximum of 20 FTP connections can be configured.
S FTP in server mode:
Per FTP session, up to 2 TCP connections are occupied (1 control connection
and 1 data connection); a maximum of 10 FTP sessions at the same time are
possible.
Characteristic Data for the FTP Client Mode
To allow use of the FTP client blocks, a TCP connection must be configured with
the ”Use FTP protocol” option. Of the available TCP connections, a maximum of
20 TCP connections with the ”Use FTP protocol” option can be configured / used.
The following table shows the memory requirements of the FCs available for FTP
services.
The block execution times in FTP depend on the reaction times of the partner and
the length of the user data; a general statement about the times is therefore not
possible.
Table 5-7
Name
Version FC no. Load
memory
bytes
Work
memory
bytes
MC7 bytes Local data
bytes
FTP_CONNECT 1.0 40 1482 1236 1200 86
FTP_STORE 1.0 41 1794 1514 1478 102
FTP_RETRIEVE 1.0 42 1934 1642 1606 106
FTP_DELETE 1.0 43 1478 1232 1196 86
FTP_QUIT 1.0 44 968 796 760 46
5.8 Characteristic Data of TCP Connections for HTTP
Each HTTP session occupies up to 4 TCP connections as soon as you use one or
more Web browsers to display data or files of the CP.

Siemens CP 443-1 Specifications

General

Brand	Siemens
Model	CP 443-1
Category	Computer Hardware
Language	English