Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 266)

Chapter
10
10-1
The Objects
This chapter defines all the objects, and describes the unique
characteristics of each type. Objects specifically designed for either
Keypad or Touch Screen terminals are identified as such.
Objects are the individual components of a screen. Each object is a
configurable and dynamic representation of a control panel component.
Examples include push buttons, selectors, bar graphs, and numeric
displays.
Certain types of objects have specific characteristics:
background text and graphics don’t interact with the terminal
functions or the PLC controller. They are used to create titles for screens
and some objects, and to draw graphics, such as frames, circles, and
arrows
momentary push buttons work very similarly to physical push buttons
which release when no longer pressed: they have a “normal” state which
they always default to, and to which they always return after being
released
retentive objects are given a certain setting which they retain until it is
changed. Many PanelView objects are retentive, including maintained
push buttons, control list selectors, scrolling list object, and buttons
which increment, decrement, or set values
display objects are used whenever you need to display a PLC value on
the screen, perhaps to show one of several states, a numeric or text
readout, or a bar graph. There are also some special display objects,
such as a time and date display and a local message display, which can
display preset messages when triggered by the PLC controller
screen selectors are a special category; they are used to leave the
current screen and go to another screen. If simple buttons are used, the
operator selects a specific screen; if a screen list selector is used, the
operator can have a choice of screens to select. Unless your application
allows the PLC controller to control all screen changes, every screen
should contain at least one screen selector; otherwise the operator will
not be able to change screens
IMPORTANT: A maximum of 255 objects can exist on a single screen.
Object Characteristics