Programming The Language Switch - Siemens S7-1200 System Manual

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Programming the language switch

The Web server performs switching between languages through the use of a cookie named

"siemens_automation_language". This is a cookie defined and set in the HTML pages, and

interpreted by the Web server to display a page in the appropriate language from the

language folder of the same name. The HTML page must include a JavaScript to set this

cookie to one of the pre-defined language identifiers: "de", "en", "es", "fr", "it', or "zh".

For example, if the HTML page sets the cookie to "de", the Web server switches to the "de"

folder and displays the page with the default HTML page name as defined in the STEP 7

configuration (Page 659).

The following example uses a default HTML page named "langswitch.html" in each of the

language folders. Also in the HTML directory is a folder named "script". The script folder

includes a JavaScript file named "lang.js". Each langswitch.html page uses this JavaScript to

set the language cookie, "siemens_automation_language".

HTML for "langswitch.html" in "en" folder

The header of the HTML page sets the language to English, sets the character set to UTF-8,

and sets the path to the JavaScript file lang.js.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<title>Language switching english page</title>

The body of the file uses a select list for the user to select between German and English.

English ("en") is pre-selected for the language. When the user changes the language, the

page calls the DoLocalLanguageChange() JavaScript function with the value of the selected

</table>

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG

<select name="Language"

<option value="de" >German</option>

<option value="en" selected >English</option>

onchange="DoLocalLanguageChange(this)"

11.6 User-defined Web pages