Appendix
NPC-8220
· 55 ·
market.
PEG Port
PCI Express used for graphics. A graphics port with 16 PCIe channels, used to expand
graphics module.
PIC mode
Peripheral interrupt controller, having 15 interrupt lines.
POST
Self-test executed by BIOS after the PC is powered on. For example, RAM test and
graphics controller test. If BIOS detects any error, the system will output audio signal
(buzzer code); reason for the error and related information will be indicated on the
screen.
PROFIBUS/MPI
Process Field Bus (standard bus system of process application program).
PROFINET
PROFINET is the standard name of industrial Ethernet developed and maintained by
PROFIBUS users. PROFINET unifies the protocol and specifications of industrial
Ethernet, to meet the requirement of industrial automation technology.
RAID
Redundant Array of Independent Disks: a data storage system, which usually stores
data and corresponding error correction code (such as parity bit) on at least two hard
disk volumes, so as to improve reliability and performance. Hard disk array is
controlled by hard drive controller which manages program and corrects errors. RAID
system is usually realized in network server.
ROM
ROM refers to Read-Only Memory. It can separately search each storage address. The
program or data are permanently stored, so they will not be lost when power failure
occurs.
