R01.43
22.10.2018
Page 101
5.6.3 Telnet-Server
In addition to the digital inputs / outputs, the control unit has a Telnet server. Like the
digital inputs / outputs, the configured fieldbus interfaces are addressed. The bit ad-
dress can be used to access each input / output. The port of the Telnet server is defined
via the menu of the control unit in the "aflexConfigurator". By default, this is preconfig-
ured on port 23. The Telnet server is activated or deactivated in the same menu.
Figure 80: Telnet Configuration
Console
A Telnet connection can be tested in the console. The connection is established via
the "connect" & "login" button, the "heartbeat" shows the existing connection. A brief
description of the Telnet protocol is stored in the "command overview".
Telnet-Protocol
The Telnet protocol based on the ASCII code. An empty space (0x20) is used as a
separator. At the end of each command, a "Carriage Return" (0x0D) & "Line Feed"
(0x0A) is necessary.
Login
To log on to the Telnet server, a user name and password must be transferred. After
the connection is established, the Telnet server requested a user name via "TU\r\n"
Type User. The password is then requested by means of "TP\r\n" type password. After
successful login, the server logs "LI 1\r\n" Login "true" or "LI 0\r\n" Login "false" for
incorrect logging. To log in, use the following user & password:
User name: "Admin"
Password: "Telnet Server"
A command is defined as follows:
