Importing Fragments; Combining Definitions - Siemens S7-1200 System Manual

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11.6 User-defined Web pages

Manual fragments

If you create a manual fragment for a user-defined Web page or portion of a page, then your

STEP 7 program must control when the fragment is sent. The STEP 7 program must set

appropriate parameters in the control DB for a user-defined page under manual control and

then call the WWW instruction with the control DB as modified. For understanding the

structure of the control DB and how to manipulate individual pages and fragments, see the

topic Advanced user-defined Web page control (Page 660).

Importing fragments

You can create a named fragment from a portion of your HTML code and then import that

fragment elsewhere in your set of user-defined Web pages. For example, consider a set of

user-defined Web pages that has a start page and then several other HTML pages

accessible from links on the start page. Suppose each of the separate pages is to display the

company logo on the page. You could implement this by creating a fragment (Page 637) that

loads the image of the company logo. Each individual HTML page could then import this

fragment to display the company logo. You use the AWP Import_Fragment command for this

purpose. The HTML code for the fragment only exists in one fragment, but you can import

this fragment DB as many times as necessary in as many Web pages as you choose.

Excerpt from HTML code that creates a fragment to display an image:

<p><img

src="company_logo.jpg"></p>

Excerpt from HTML code in another .html file that imports the fragment that displays the logo

Both .html files (the one that creates the fragment and the one that imports it) are in the

folder structure that you define when you configure the user-defined pages in STEP 7

When declaring variables for use in your user-defined Web pages, you can combine a

variable declaration and an alias for the variable (Page 634). You can also declare multiple

In_Variables in one statement and multiple Out_Variables in one statement.

Text string: name of the fragment DB to be imported

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG