Siemens SIMATIC Rack PC 547B, Operating Instructions Manual

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Glossary
SIMATIC Rack PC 547B
130
Operating Instructions, 12/2007, A5E01127519-02
POST
Self-test performed by the BIOS after the computer is switched on. Performs a RAM test and
a graphics 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)
Programmable controller (PLC)
The programmable controllers (PLC) of the SIMATIC S5 system consist of a central
controller, one or more CPUs, and various other modules (e.g. I/O modules).
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 save data and
the corresponding error correction codes (parity bits, for example) to at least two hard disk
volumes in order to enhance 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 configuring hard disks and the Windows operating system.
Reset
Hardware reset: Reset/restart of the PC using a button/switch.
Restart
Warm restart of a computer without switching the power off (Ctrl + Alt + Del)
Restore DVD
The Restore DVD is used to restore the system partition or the entire hard disk to factory
state if the system has crashed. The bootable DVD contains all the necessary image files.
You can also create a boot disk allowing restoration via the network.