saia-pcd.com
227
Server
Client
20
Data
21
Cmd
1026
Cmd
1027
Data
1
2
3
4
FTP
RS-232
Ethernet
PPP
1
SBC software
3
SBC S-Web technology
2
Communication & Inter-
action
Communication & Interaction
4
Room automation
The File Transfer Protocol (FTP) is used to load files into or read files from PCD devices via the network. Files (websites, log data,
documents, etc.) are saved in the file system of the PCD devices. User groups and passwords can be set up to protect access to the FTP
server and individual files (e.g. read only).
PG5 device configurator settings
Activating/deactivating the FTP server
Configuring port numbers (standard port: 21),
user and access rights
Advanced settings (no. of connections, timeout, etc.)
Active/passive FTP mode
PCD devices only support the active connection mode!
The client establishes a connection to server port 21 and
provides the server with the port number for the data channel.
Unlike in passive mode (here the port for the data channel is always
20), this port number is not specified and can be in the range >1023.
This often causes problems with firewalls, as these port numbers are
not approved.
Another means of transferring files is to use FTP CGI (Common Gate-
way Interface) interfaces in the web server. If the respective syntax is
known, it is also possible to transfer data between a web client and
PCD devices via this interface. For more information on this please
refer to Chapter B3 S-Web
.
Technical data
FTP standard
RFC 959
Standard port number
21 (can be set) plus dynamic port (>1023) for data
Connection mode
PCD devices only support the active FTP mode
Number of FTP connections per PCD Standard 3 (max. 5 adjustable)
Interfaces
Ethernet, serial RS-232 with PPP
FTP: Protocol for transferring files
IP protocols
Flash cards
File system
Internet
Intranet
Telecom
