Siemens SIMATIC PANEL PC 877 - Manual (Page 277)

Glossary
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
Glossary-7
Pixel
PixElement (picture point). The pixel represents the smallest element that can be reproduced
on-screen or on a printer.
Plug&Play
Generally, a reference to the ability of a computer to automatically configure the system for
communication with peripheral devices (for example monitors, modems or printers). The
user can plug in a peripheral and ”play” it at once without manually configuring the system. A
Plug&Play PC requires both a BIOS that supports Plug&Play and a Plug&Play expansion
card.
POST
Self-test performed by the BIOS after the computer is switched on. Performs a RAM test and
a graphic controller test, for example. The system outputs audible signals (beep codes) if the
BIOS detects any errors; the relevant message indicating cause of error is output on the
screen.
PROFIBUS/MPI
Process Field Bus (standard bus system for process applications)
PXE server
A Preboot Execution Environment server is part of a network environment and can provide
software to connected computers even before they boot. This can involve operating system
installations or servicing tools, for example.
RAID
Redundant Array of Independent Disks: Data storage system which is used to store data
along with the error correction codes (e.g. parity bits) on at least two hard disks, in order to
increase system reliability and performance. The hard disk array is controlled by
management programs and a hard disk controller for error correction. The RAID system is
usually implemented in network servers.
Recovery CD
Contains the tools for setting up the hard disks and the Windows operating system.
Reset
Hardware reset: Reset/restart of the PC using a button/switch.
Restart
Warm start of a computer in operating state without switching off the power supply (Ctrl + Alt
+ Del)