Operating instructions

Abbreviations
C.1 Abbreviations
SIMATIC Rack PC IL 43
C-2 Operating Instructions, Edition 09/2005, A5E00432875-01
Abbreviation Term Definition
CGA Color Graphics Adapter Standard monitor interface
CLK Clock pulse Clock signal for controllers
CMOS Complementary Metal Oxide
Semiconductors
Complementary metal oxide semiconductors.
Computer chips featuring lower power
consumption compared with common chipsets.
They are, on the other hand, slower than
conventional circuits.
COA Certificate of Authentication Microsoft Windows Product Key
CoL Certificate of License License authorization
COM Communications Port Term for the serial interface
CP Communication Processor Communication computer
CPU Central Processing Unit Central unit. Core component of the computer;
responsible for all data processing routines. The
processor receives the relevant data and
programs from work memory.
CSA Canadian Standards Association Canadian standardization organization
CTS Clear To Send Clear to send
DP Distributed I/Os
DRAM Dynamic Random Access Memory
DDRAM Double Data Random Access Memory Memory chip with high-speed interface
DCD Data Carrier Detect Data carrier signal detection
DMA Direct Memory Access Direct memory access. Data transfer method for
direct memory access, allowing data exchange
between system components and the RAM
without intervention of the CPU. This is controlled
by the DMA controller, in order to reduce
processor load and to significantly increase
processing performance.
DOS Disc Operating System Operating system without GUI
DQS Deutsche Gesellschaft zur Zertifizierung
von Qualitätsmanagement mBH
DSR Data Set Ready Ready for operation
DTR Data Terminal Ready Data terminal is ready.
Control signal for data transfer.
DVD Digital Versatile Disc Digital versatile disk. Standard that describes a
data carrier which is similar to a conventional CD,
but allows read/write operations on both sides of
the DVD; storage capacity up to 8.5 GB of data.
DVI Digital Visual Interface Digital display interface
ECC Error Correction Code Error correction code. Method for the correction
of errors in RAM chips; used in high-performance
PCs.
ECP Extended capability port Extended parallel port
EGA Enhanced Graphics Adapter PC to monitor interface
ESD Components sensitive to electrostatic
charge
DM Electronic Manual