List of abbreviations
B.1 Abbreviations
SIMATIC IPC677D
Operating Instructions, 09/2014, A5E32995420-AC
181
Abbreviation
Term
Meaning
SELV
Safety Extra Low Voltage
Safety extra low voltage
SLC
Second Level Cache
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
SO-DIMM
Small Outline Dual Inline Memory Module
SOM
SafeCard on Motherboard (SOM)
SPP
Standard Parallel Port
Synonym for parallel port
SRAM
Static Random Access Memory
Static RAM
SSD
Solid State Drive
SVGA
Super Video Graphics Array
Enhanced VGA standard with at least 256 colors
SVP
Serial number of the device
SW
Software
TCO
Total Cost of Ownership
TFT
Thin-Film-Transistor
Type of LCD flat-screen
TPM
Trusted Platform Module
Chip with security functions
TTY
Tele Type
Asynchronous data transfer
TxD
Transmit Data
Data transfer signal
TXT
Trusted Execution Technology
Hardware implementation
TWD
Watchdog Time
Watchdog monitoring time
UEFI
Unified Extensible Firmware Interface
UL
Underwriters Laboratories Inc.
US organization for tests and certifications according
to own or binational standards (with CSA / Canada)
standards.
UMA
Unified Memory Architecture
Video memory
URL
Uniform Resource Locator
Designation of the full address of an Internet page
USB
Universal Serial Bus
UXGA
Ultra Extended Graphics Array
Graphic standard, maximum resolution
1.600 x 1.200 pixels.
V.24
ITU-T standardized recommendation for data transfer
via serial ports
VCC
Positive supply voltage of integrated circuits
VDE
Verein deutscher Elektrotechniker (Union of
German Electrical Engineers)
VGA
Video Graphics Array
Video adapter which meets industrial standard
VRM
Voltage Regulator Module
VT
Virtualization Technology
Intel technology with which a virtually closed
environment can be made available.
VT-D
Virtualization Technology for Directed I/O
Enables the direct assignment of a device (e.g.
network adapter) to a virtual device.
W2k
Windows 2000
WAN
Wide Area Network
WAV
Wave Length Encoding
Loss-free file format for audio data