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Examples
The following example shows a STEP 7 user program that is checking for a fragment with an
ID of 1 to be in the waiting state, following a prior call to the WWW instruction. It might also
wait for other application-specific conditions to occur. Then it performs whatever processing
is necessary for the fragment, such as setting data block tags, performing calculations, or
other application-specific tasks. Afterwards, it sets the continue flag so that the Web server
will execute this fragment.
When the program calls the WWW instruction with this modified control DB, the user-defined
Web page with this fragment can be displayed from the Web browser.
Note that this is a simplified example; the fragment to check could be in any one of the four
requesttab structs in the array.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Web server
11.6 User-defined Web pages
663
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