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Glossary - Siemens simatic ipc227e Operating Instructions Manual

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Glossary

AHCI mode
AHCI is a standardized method to address the SATA controller. AHCI describes a structure
in the RAM, which contains a general area for control and status, as well as a command list.
APIC mode
Advanced peripheral interrupt controller. 24 interrupt lines are available.
Automation system
A programmable controller (PLC) of the SIMATIC S7 system consist of a central controller,
one or several CPUs, and various I/O modules.
Backup
Duplicate of a program, data medium or database, used either for archiving purposes or for
the protection of vital and non-replaceable data against loss when the working copy is
corrupted. Certain applications automatically generate backup copies of data files, and
manage both the current and the previous versions on the hard disk.
Baud
Physical unit for the step speed in signal transmission. Defines the number of transferred
signal states per second. With only two states, one baud is equivalent to a transmission rate
of 1 bps.
Cache
High-speed access buffer for interim storage (buffering) of requested data.
CE marking
Communauté Européene: The CE symbol confirms the conformity of the product with all
applicable EC directives such as the EMC Directive.
CFast
The faster SATA protocol is used with the CFast standard for memory cards based on
CompactFlash. The connectors on these cards are not compatible with a classic
CompactFlash card.
SIMATIC IPC227E
Operating Instructions, 11/2016, A5E35782395-AB
145

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