Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 396)

F ACTORY T ALK V IEW M ACHINE E DITION U SER ’ S G UIDE
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Set up how objects are used at run time
Just as you must provide operators with a way to navigate between displays at run time,
you must also make sure that operators can use the objects within the displays. The next
sections in this chapter describe how to set up your objects so the operator can:
 Press objects using a touch screen.
 Use function keys to press buttons when a mouse or touch screen is not available on
the run-time computer.
 Use the keyboard or keypad to navigate to and select lists, trends, and ActiveX input
objects.
 Use buttons to work with lists and trends.
 Repeat a button’s action by pressing and holding it.
 Ensure that tag values are read by the data source before sending new values.
Position objects for touch screens
If the operator will be using a touch screen at run time, keep these tips in mind when
positioning graphic objects in your displays:
 Don’t place important buttons where they’ll be blocked by an On Top display. The
user can’t press a covered button.
 Ensure buttons are large enough for users to touch easily.
 Use touch margins for buttons that are positioned close together, to ensure that the
adjacent button is not pressed by mistake.
Use touch margins
Touch margins are touch-insensitive borders inside the button’s margin. If the operator
presses on the touch margin, the button press is not registered. Touch margins are useful
when buttons are positioned close to each other and you want to make sure the operator
doesn’t press the wrong button by mistake.
You can create touch margins at the top and bottom of the button, at the sides, or on all
four sides.
In the illustration below, the button’s border and touch margins are the same size, 12
pixels. A button press would be registered only when the darker square in the middle of
the button is pressed.