Siemens SIMATIC Box PC 840 Manual page 197

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, declarations, and data for signal processing, by
which a system (or process) is controlled or influenced. It is linked to a
programmable module (for example, CPU, FM) and can be structured in smaller
units (blocks).
V
V.24 Interface
The V.24 interface is a standardized interface for data transmission. printers,
modems, and other hardware modules can be connected to a V.24 interface.
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.
Work Memory
The work memory is a RAM memory in the CPU which the processor accesses
during user program processing.
Write Protection
Write protection for files or diskettes
S Write protection for files; this type of write protection is stored in the computer
and is allocated by the system manager.
S 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.
SIMATIC Box PC 840 Manual
A5E00085984-04
Glossary
Glossary-15