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Glossary
Disk Drive
The disk drive (floppy disk drive) is used to store programs and data on
diskette (write access) or to load from diskette to the computer (read
access).
Diskette
The diskette (floppy disk) is an external data access memory on which
all types of files and programs can be stored. The storage medium is a
round magnetic disk in a plastic cover to protect it from getting
scratched.
Display
The flat monitor of the PG 720.
Double-Click
Pressing and releasing the left mouse button very quickly twice in
succession without moving the mouse. This action is normally to open
an object or program.
Drives
The PG 720 programming device is equipped with one hard disk drive
and one floppy disk drive.
Drivers
These are programs which are part of the operating system. They
adapt the data from user programs to the specific formats required by
the I/O devices such as hard disk, printers, and monitors.
In graphics-supported programs, a menu line is positioned on the top
Drop-Down Menu
edge of the screen. The menu titles contained in this line can be set
either as drop-down or pull-down menus. Drop-down menus "roll" down
as soon as the mouse pointer passes over a menu title. Pull-down
menus only "roll" down when the menu title is clicked on. Different
functions can then be called from these menus by moving the mouse
and clicking on an item in a menu.
E
EPROM/
These are plug-in submodules with EPROM/EEPROM chips. S5 user
EEPROM
programs can be stored on them. These programmed submodules are
Submodules
then plugged in specially designed receptacles in the programmable
logic controller.
Extended Memory
A memory extension can be installed in a programming device to
increase the size of the memory.
Glossary-4
PG 720 PII Programming Device
C79000-G7076-C756-02
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