Siemens SINUMERIK 840D sl Operating Manual page 147

Meanings of the Events
The following table describes what you achieve when using a certain event:
Table 4-15
Event
OnInit
OnNext
OnEnd
The events are displayed schematically in the following graphic "Executing scripts on the dialog
pages".
Executing scripts in the dialog pages
The execution of the dialog pages and any dialog scripts (in the yellow box) is shown
schematically in the following diagram.
The procedures that can potentially control the sequence of the dialog or script are listed as
example.
In the dialog script, you can basically use any of the elements of the script language.
Further information is contained in the Script language (Page 279) section, but also observe
the supplementary conditions listed in the Data accesses (Page 333) section.
The context menu supports you when generating your script.
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Event - Meaning
Meaning / Time of script execution
The script is executed before the dialog page is displayed.
OnInit is used, for example:
● To (conditionally) skip this dialog page
● To issue queries to the operator and process them before the dialog page
opens
● To change settings of this dialog page via system variables based on current
processing
The script is executed in the dialog immediately after clicking "Next".
OnNext is used, for example:
● To check operator inputs after clicking the "Next" key
● To return to the input
At this point in time, set values of the dialog page can be checked by exporting
system variables.
The dialog execution can be interrupted in the script with the Redo() procedure.
In this case, settings of the dialog page can be corrected.
The execution of the dialog page can be restarted. The "OnNext" script is also
executed again.
After processing has been completed, the script is executed at the end of a dialog
page.
Here, via write access to system variables for example, you can set which of the
following dialogs is to be executed or not.
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