In portal's F1-Help, search for "web server access for https (s7-1200)" (which oddly for me comes up as the last search result).

Follow the suggested actions for your specific situation.

zago1819

Hi, 

i try use webserver of my plc s7 1200 , 1212c ac/dc/rly. its not opening user difne page on pc but same time if i try open it on mobile same network wifi. its working.

i getting in pc this error.(image)

what i missing in pc to install or active ?

thanks

So you did not follow the instructions provided by the F1-help section related to your exact problem.

You can of course contact Siemens support via support request, but they will tell you the same thing.  You may be able to solve the problem with their help reading the F1-help to you over email. 

zago1819

hi, 

its same.

just on pc not working but if i try with mobie its working.

on pc its opening page and then i give user as admin or any other its giveing me this error.

If you have configured the web server to only allow https protocol, you need to adhere to the guidance provided in F1-help, quoted here to make it easy for those having problems using the F1-help (which saves hours and hours of time for me):

F1-Help

Access via HTTPS

HTTPS is used for encrypting and authentication of communication between the browser and web server.

To transfer data between the browser and the CPU using the HTTPS protocol, enter the URL ashttps://ww.xx.yy.zzin the address line of your browser, whereby ww.xx.yy.zz stands for the IP address of the CPU.

You require a valid, installed certificate for error-free HTTPS access to the CPU.

If no certificate is installed a warning is displayed with a recommendation not to use this page. To view the page you must explicitly "Add exception".

You can receive a valid certificate (Certification Authority) "SIMATIC CONTROLLER" as a download from the "Intro" webpage under "Download certificate". The help function for your respective web browser provides information on how to install a certificate.