Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 487)

17 • C REATING GRAPHIC OBJECTS
17–45
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Using keys to scroll the list
When a piloted control list selector is operator controlled, it works with:
 Key objects. These are graphic objects that duplicate the functions of keyboard keys.
Use them with touch-screen terminals.
 The arrow keys and Enter key on a terminal’s keypad.
 The arrow keys and Enter key on a keyboard.
The operator presses the keys to scroll up or down the list, or to make selections from the
list. The keys can be set up to work with the piloted control list selector that has focus, or
with a specific piloted control list selector.
For more information about keys, see “Using key objects to simulate keyboard functions”
on page 17-32.
Controlling the list view
If the piloted control list selector contains more states than the list can display
simultaneously, the value of the Top Position tag (if assigned) changes whenever the item
at the top of the list changes.
If the Visible States tag is assigned, the values assigned to all visible states are written to
the Visible States tag whenever the list scrolls.
If all the visible states are written, the tag must support arrays, and the array must be the
same length as the number of visible states in the piloted control list selector.
Selecting items directly or remotely
Each state can be selected directly by an operator, or remotely by a device such as a
programmable controller. The operator or the controller scrolls through the list to select a
different state or a different group of visible states.
The filled cursor means the
operator can select this state. The hollow cursor means the
operator cannot select this state.