Abbreviations
SIMATIC IPC1047
122
Operating Instructions, 09/2018, A5E45118479-AA
Abbreviation Term
Meaning
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 components 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)
ODD
Optical Disk Drive
OLE
Object Linking and Embedding
Coordination of various Microsoft documents, e.g.
spreadsheet in text editor.
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
International Association
PI
Protective Earth
Protective conductor
PEG
PCI Express Graphics
PIC
Programmable Interrupt Controller
Programmable interrupt controller
PRTC
Protected Real Time Clock
Clock in the management engine MEBx
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 switchgear cabinet
RAM
Random Access Memory
Main memory
RDIMM
Register Dual Inline Memory Module
Load-reduced DIMMs with additional RAM register
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
SAS
Serial attached SCSI
SATA
Serial Advanced Technology Attachment
SCSI
Small Computer System Interface
SDRAM
Synchronous DRAM
SELV
Safety Extra Low Voltage
Safety extra low voltage
SLC
Second Level Cache
Single-level cell
Memory cells in which only one bit per cell is saved
SMART
Self Monitoring Analysis and Reporting
Technology
Hard disk error diagnostics program
SMS
Short Message Service
Short message via telecommunication network
SNMP
Simple Network Management Protocol
Network protocol