Web server
11.7 Constraints
S7-1200 Programmable controller
666 System Manual, 03/2014, A5E02486680-AG
Feature restrictions when the Internet options do not allow cookies
If you disable cookies in your Web browser, the following restrictions apply:
● You cannot log in.
● You cannot change the language setting.
● You cannot switch from UTC time to PLC time. Without cookies, all times are in UTC
time.
Importing the Siemens security certificate
You can import the Siemens security certificate into your Internet options so that you won't
be prompted for security verification when you enter https://ww.xx.yy.zz in your Web
browser, where "ww.xx.yy.zz" is the IP address of the CPU. If you use an http:// URL and not
an https:// URL, then you do not need to download and install the certificate.
Downloading the certificate
You use the "download certificate" link from the Introduction page (Page 613) to download
the Siemens security certificate to your PC. The procedure varies according to which Web
browser you use:
Importing the certificate to Internet Explorer
1. Click the "download certificate" link from the Introduction page. A "File Download -
Security Warning" dialog pops up.
2. From the "File Download - Security Warning" dialog, click "Open" to open the file. A
"Certificate" dialog appears.
3. From the "Certificate" dialog, click the "Install Certificate" button to launch the Certificate
Import Wizard.
4. Follow the dialogs of the "Certificate Import Wizard" to import the certificate, letting the
operating system automatically select the certificate store.
Importing the certificate to Mozilla Firefox
1. Click the "download certificate" link from the Intro page. An "Opening
MiniWebCA_Cer.crt" dialog pops up.
2. Click "Save file" from the "Opening MiniWebCA_Cer.crt" dialog. A "Downloads" dialog
appears.
3. From the "Downloads" dialog, double-click "MiniWebCA_Cer.crt". If you have attempted
the download more than once, multiple copies show up. Just double-click any one of the
"MiniWebCA_Cer.crt" entries.
4. Click "OK" if prompted to open an executable file.
5. Click "Open" on the "Open File - Security Warning" dialog if it appears. A "Certificate"
dialog appears.