B4A−36; Characteristic Data Http And Ftp Operation - Siemens CP 443-1 Manual

5 Performance Data
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
FTP_CONNECT
FTP_STORE
FTP_RETRIEVE
FTP_DELETE
FTP_QUIT
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.
B4A−36
FC no.
1.0 40
1.0 41
1.0 42
1.0 43
1.0 44
Load Work
memory memory
bytes bytes
1482 1236
1794 1514
1934 1642
1478 1232
968 796
CP 443-1 Advanced for Industrial Ethernet / Manual Part B4A
MC7 bytes Local data
bytes
1200 86
1478 102
1606 106
1196 86
760 46
Release 01/2007
C79000-G8976-C193-06