Glossary
SIMATIC Rack PC 840 V2
Glossary-8
Operating Instructions, Edition 05/2006, A5E00248055-04
ROM
Read-Only Memory ROM is a read-only memory in which every memory location can be
addressed individually. The programs or data are permanently stored and are not lost in the
event of a power failure.
SCSI interface
Small Computer System Interface Interface for connecting SCSI devices (e.g. hard disk or
optical drives)
Session at once
In session at once, the CD can be written to both with an audio session and a data session.
The two sessions are written to at once (as in disc at once).
SETUP (BIOS Setup)
A program in which information about the device configuration (that is, the configuration of
the hardware on the PC/PG) is defined. The device configuration of the PC/PG is preset with
defaults. Changes must therefore be entered in the SETUP if a memory extension, new
modules or a new drive are added to the hardware configuration.
Track-at-once
In track-at-once recording, a CD can be written to in bits in several sessions if the CD was
not closed.
Troubleshooting
Error cause, cause analysis, remedy
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
Warm restart
The restart of a computer after a program was aborted. The operating system is loaded and
restarted again. The hot key CTRL+ ALT+ DEL can be used to perform a warm start.
Windows
Microsoft Windows is a multitasking graphical user interface. Windows provides a standard
graphical interface based on drop-down menus, windowed regions on the screen, and allows
operation with a pointer device such as a mouse.
WLAN
Wireless LAN is a local network that transmits data via radio waves, infrared light or another
wireless technology. Wireless LAN is mainly used in connection with mobile computers in the
office or in factory environments.
