Special functions of a CPU 41x
3.1 Web Server
S7-400 Automation System, CPU Specifications
3-2 Manual, 10/2006, 6ES7498-8AA04-8BA0
Activating Web Server
The web server is activated in its factory state. It is deactivated in HW Config with its basic
configuration. You can activate the web server in HW Config with the command
"CPU -> Object Properties -> Web".
Web Access on the CPU
Proceed as follows to access the web server:
1. Connect the programming device/PC via the Ethernet interface with the CPU.
2. Open the Web browser (for example, the Internet Explorer).
Enter the IP address of the CPU in the "Address" field of the web browser in the form
http://a.b.c.d.
The start page of the CPU opens. From the start page you can navigate to further
information.
You can also access the web server using a PDA. Use the address format
http:\\a.b.c.d/basic for this access.
Display Languages
You can select 2 of the following 5 languages for the display of the alarm texts and of the
diagnostic buffer. However, you can only select the languages in which you have installed
STEP 7.
● German
● English
● French
● Spanish
● Italian
Selecting Display Languages
Select the display languages in HW Config under "CPU -> Object Properties -> Web".
If you configure message texts for the message blocks AlarmS/SQ and AlarmD/DQ, you
have to compile the HW Config again afterwards.
Safety
The web server by itself does not provide any security. Protect your web-compatible CPUs
against unauthorized access by means of a firewall.
Timeliness of the Display
The information displayed by the web server is static, in other words, the display is not
updated. However, you can see the most recent data when you print out the information.
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