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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.
ATAPI CD-ROM Drive
AT Bus Attachment Packet Interface (connection to AT bus) CD-ROM drive
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.
Chipset
Located on the motherboard, connects the processor with the RAM, the graphics controller,
the PCI bus, and the external interfaces.
SIMATIC IPC1047E
Operating Instructions, 03/2021, A5E50259546-AA
131
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