Siemens SIMATIC IPC847D - Page 213

Glossary
SIMATIC IPC847D
Operating Instructions, 01/2014, A5E32997454-AA
213
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
Pro
cess
Fi
eld
Bus
(standard bus system for process applications)
PROFINET
PROFINET is the name of the standard for Industrial Ethernet developed and maintained by
the PROFIBUS user organization. PROFINET unites protocols and specifications with which
Industrial Ethernet meets the requirements of industrial automation technology.
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
P
reboot E
x
ecution
E
nvironment 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
R
edundant
A
rray of
I
ndependent
D
isks: 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.
RAL
R
estricted
A
ccess
L
ocation: Installation of the device in a production facility with restricted
access, for example, a locked control cabinet.
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.