Siemens SIMATIC PG 720 P Manual page 120

Glossary
T
Text Cursor
The cursor shows where text may be entered, for example, in text editors and
in dialog windows. In many applications the position of the cursor can be
changed by moving and clicking the mouse pointer.
TFT Display Thin Film Transistor Color Display
Trackball
The trackball is used as a pointing device for programs serviced by a mouse.
On the PG 720, the trackball is integrated in the keyboard.
U
User Interface The software-controlled menus and screens on the monitor through which the
user communicates with the program.
User Program
A collection of all the instructions and declarations for signal processing, by
which a system (or process) is controlled or influenced.
V
VGA (Video Graphics Array)
Color graphics control mode
W
Warm Restart A warm restart is a restart after a program has been aborted. The operating
system is reloaded and restarted. A warm restart is performed with the key
combination CTRL+ALT+DEL.
Working Memory
The memory in which a program is stored which can be processed. Also
known as main memory.
Write Protection
Write protection for files or diskettes
Glossary-10
Write protection for files; this type of write protection is stored in the
computer and is allocated by the system manager.
Diskette write protection; for 5 1/4 in. diskettes by blanking out the hole
on the right-hand edge with an adhesive label, for 3 1/2 in. diskettes or
EOD disks by opening the write protection hole.
PG 720 P Programming Device
C79000-G7076-C721-02