Siemens SIMATIC IPC427E, Operating Instructions Manual

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List of abbreviations
SIMATIC IPC427E
150
Operating Instructions, 09/2017, A5E37454814-AB
Abbreviation Term Meaning
NAMUR Normenarbeitsgemeinschaft for Mess- und
Regelungstechnik in der chemischen Industrie
(standardization body for instrumentation and
control technology in the chemicals industry)
NC Not Connected Not connected
NCQ Native Command Queuing Automatic re-sorting of the file and disk access,
for increased performance
NEMA National Electrical Manufacturers Association Syndicate of manufacturers of electrical compo-
nents in the USA
NMI Non Maskable Interrupt Interrupt the processor can not reject
NTFS New Techniques File System Secure file system for Windows versions (2000,
XP, 7)
NVRAM Non Volatile Random Access Memory Non-volatile data memory. Data memory is re-
tained without external power supply.
ODD Optical Disk Drive
OPC OLE for Process Control Standardized interface for industrial processes
PATA Parallel ATA
PC Personal computer
PCI Peripheral Component Interconnect High-speed expansion bus
PCIe Peripheral Component Interconnect express High-speed serial, differential full-duplex PtP
interface with high data rate.
PCMCIA Personal Computer Memory Card Interna-
tional Association
PI Protective Earth Protective conductor
PEG PCI Express Graphics
PG Programming device
PIC Programmable Interrupt Controller Programmable interrupt controller
PIC-E Peripheral Component Interconnect Express
POST Power On Self Test
PXE Preboot Execution Environment Software for running new PCs without hard disk
data via the network
RAID Redundant Array of Independent Disks Redundant hard disk array
RAL Restricted Access Location Installation of device in operating facilities with
restricted access - for example, a locked switch-
gear cabinet
RAM Random Access Memory
RI Ring Input Incoming call
ROM Read-Only Memory
RS 485 Reconciliation Sublayer 485 Bi-directional bus system designed for up to 32
nodes
RTC Real Time Clock Real-time clock
RTS Reliable Transfer Service Request to send
RxD Receive Data Data transfer signal
SATA Serial Advanced Technology Attachment
SCSI Small Computer System Interface