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CONFIGURING THE COLOR VIRTUAL HMI
DEFINING SYSTEM ACTIONS
update. You should note that you can severely reduce system performance by
performing complex actions on every display update. You should also note that
in many cases, actions that you may think need to be run on each update can be
performed using triggers, or by using mapping blocks.
• The Parent Page property is used to indicate the page to be displayed when the
HMI’s Exit key is pressed while this page is active. Selection of this page can
be overridden using the techniques below.
• The Next Page property is used to indicate the page to be displayed when the
HMI’s Next key is pressed while this page is active, and when the cursor is on
the last data entry field on the page. This selection can also be overridden.
• The Previous Page property is used to indicate the page to be displayed when the
HMI’s Prev key is pressed while this page is active, and when the cursor is on
the first data entry field on the page. This selection can also be overridden.
• The Period property is used to define the time in seconds to wait without any
user interaction occurring before performing the action specified in the On
Timeout property. These properties are typically used to remove a popup or to
return to some sort of menu screen after several seconds of inactivity.
If you have too many data entry fields to fit on a single page, the Next Page and Previous
Page properties can be used to link together a series of pages to allow the operator to edit the
fields in sequence. Crimson will automatically position the cursor appropriately, such that if
the Prev key is pressed on the first field of a page, the previous page will be activated with
the cursor on the last field of that page.
DEFINING SYSTEM ACTIONS
In addition to the various actions that can be defined via page properties, Crimson gives you
the ability to define an action(s) to be run before the system starts, when the system first
starts, and an action(s) to be run once a second or on page updates, no matter which page is
displayed. These actions can be accessed by selecting the Pages icon in the left-hand pane of
the User Interface window. You should refer to previous warnings regarding the use of the On
Update property.
ADDITIONAL SYSTEM PROPERTIES
In addition to the system actions described above, there are two property pages accessed by
selecting the Pages icon that gives you access to a number of other system-wide parameters.
The Basic tab covers the following parameters…
REVISION 6 PAGE 219