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  • Writer's pictureDestek Ekibi

Start page with general CPU information

Connecting to the Web server

​Establish a connection to the Web server by entering the IP address of the interface of the configured CPU which is connected to the client in the address bar of the web browser, for example, The connection is set up and the "Intro" page opens.

​The examples in the next section provide information about the different web pages.


​The figure below shows the first page (Intro) called by the Web server.

Introduction page of the Web server of the CPU 1516-3 PN/DP

​Click the NEXT link to go to the Web server pages.


​Select the "Skip Intro" check box in order to skip the intro. The Web server will then take you directly to its start page in future. This setting is saved in the user profile of the current PC user.

​You can undo the setting "Skip Intro" by clicking the "Intro" link in the left-hand navigation bar of a web page.

Setting the user interface language

​You can change the language for the Web server interface, e.g., from English to German, in the upper right corner. This option is available to you on all web pages of the Web server.

Switching the time display

​You can set the format of the time display to Coordinated Universal Time (UTC) or PLC local time (default setting) on the left next to the language setting.

Switching the time display

​You can switch the time display on all the Web pages that provide this drop-down list.

​The displayed PLC local time comes from the time zone set in the CPU properties without consideration of the daylight saving / standard time setting.

Setting the time in the CPU properties

​The switchover has an effect on the following Web pages:

Switching the time display: Display on Web pages

​Web pages

​Display as Coordinated Universal Time (UTC) or as PLC local time

​Start page

​Last F-change

​Diagnostics buffer

​Date and time of the diagnostic buffer entry


​Date and time of the alarms

​Online backup

​Backup file with date and time of the backup


​Date of change and time of change

​File browser

​Date of change and time of change

​User files

​Date of change and time of change

​Save service data

​File with time stamp of the storage

Start page

​The start page before login offers information as shown in the figure below. The image of the CPU with LEDs shows its current status at the time of the data request.

General information before login

Log in

​To use the full functionality of the web pages, you must be logged in. Log in with a user name and password specified in the Web configuration in STEP 7. You now have corresponding permissions to access the web pages released for this user. If you have not configured a user, read-only access is granted to intro and start pages by default.


​After carrying out your required actions, log out explicitly from the Web server by clicking "Logout" in order to minimize the risk of unauthorized external access.


Session timeout

​The timeout for each started session is 30 minutes. After each update/automatic update, the session is automatically extended by another 30 minutes.

Start page after login

① "General"

​"General" contains information about the CPU whose Web server you are currently connected to, as well as the project name and the version of the TIA Portal with which the CPU was configured. The displayed TIA Portal version is at least required to load or edit the entire project.

② "Status"

​"Status" contains information about the CPU status at the time of the query.

③ "CPU operator panel"

​In the area "CPU operator panel" you have the possibility to change the operating mode of the CPU ("RUN"/"STOP" buttons ) or to have the LEDs blink ("LED blink" button) with corresponding access rights.

Additional information for F-CPUs

Start page after login to an F-CPU

④ "Fail-safe"

​"Fail-safe" contains additional information on the F-CPU. Further information about the specification is available in the ​Programming and Operating Manual SIMATIC Safety - Configuring and Programming​.


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