Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 12)

Preface
P-2
Object: An object is an individual component of a PanelView screen. Each
object takes the function of a button, switch or indicator on a control panel.
The objects can be dynamic—they can change color or value and can
display information. Each object is defined by the developer of the
PanelView screen. Examples of objects include Push Buttons, Selectors,
Bar Graphs, Numeric Displays, etc.
PanelBuilder Development Software: The program runs on the
development computer to develop application files for PanelView
terminals.
PanelView Terminal: A type of Allen-Bradley terminal with a touch
screen or rugged keypad, designed for easy operator interaction with a
PLC system over the Remote I/O link.
RAM: Static Random Access Memory. A type of memory that can
maintain its contents through the use of a battery. It does not require
continuous refreshing to maintain its contents.
Retentive: An object is described as retentive when it “retains” its PLC
value in the PanelView terminal after a screen change, an operator’s object
action, and even after the terminal’s power cycle. For example, when a
maintained push button is pressed, the corresponding PLC input is set to 1
and will not change until the button is pressed a second time. Retentive
objects always display their current states or values.
Screen: A display containing objects (such as push buttons or bar graphs)
which can monitor and control a PLC system. Screens are created with the
PanelBuilder Development Software.
System Memory: The read-only memory that contains the operating
firmware for the PanelView terminal.
Upload/Download: Downloading is the process of transferring an
application file from a development computer running the PanelBuilder
Development Software, to a PanelView terminal. Uploading is the process
of transferring an application file from the terminal back to the
development computer.
User PROM: The read-only memory chip that can be used to contain a
back-up copy of an application file, or to increase the memory available for
the application file from 64K to 128K. The chip can be either an EPROM
or an EEPROM.
There are two types of user PROM chips that can be used in PanelView
terminal: EPROMs and EEPROMs. EPROMs are Electrically
Programmable Read Only Memory chips. EEPROMs are Electrically
Erasable Programmable Read Only Memory chips.