Siemens SINUMERIK 840D sl Commissioning Manual page 729

6.3.17 Load Mask (LM)
Description
The LM function can be used to load a new dialog.
Master dialog / sub-dialog
A dialog, which calls another dialog, but is not ended itself, is referred to as a master dialog.
A dialog that is called by a master dialog is referred to as a sub-dialog.
Programming
Syntax:
Description:
Parameters:
Note
Parameter VARx transfers only the value of the variable in each case, i.e. variables can be
read and written in the sub-dialog, but are not visible in it. Variables can be returned from the
sub-dialog to the master dialog by means of the EXIT function.
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("Identifier"[,"File"] [,MSx [, VARx] ] )
LM
Load dialog
Identifier Name of the dialog to be loaded
File Path name (HMI file system or NC file system) of the
configuration file; default setting: Current configuration file
MSx Mode of dialog change
0: (Default setting) The current dialog is rejected, the new dialog
is loaded and displayed. EXIT will send you back to the
standard application. You can use the MSx parameter to
determine whether or not the current dialog should be
terminated when changing dialogs. If the current dialog is
retained, variables can be transferred to the new dialog.
The advantage of the MSx parameter is that the dialogs do not
always need to be reinitialized when they are changed.
Instead, the data and layout of the current dialog are retained
and data transfer is made easier.
1: The current master dialog is interrupted when the LM function
is initiated. The new sub-dialog is loaded and displayed. EXIT
will end the sub-dialog and return to the point at which the
master dialog was interrupted.
In the master dialog, the UNLOAD block is not processed
during the interruption.
VARx Precondition: MS1
List of variables, which can be transferred from the master
dialog to the sub-dialog. Up to 20 variables, each separated by
a comma, can be transferred.
Programming commands
6.3 Functions
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