Siemens SENTRON 7KN POWERCENTER 3000 Manual page 140
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Glossary
LAN
Local Area Network: A LAN is a local area network that consists of a group of computers and
other devices that are distributed over a relatively limited area and connected by
communication cables. The devices connected to a LAN are called nodes. Networks are used
to share the use of files, printers, or other resources.
License key
License key is the electronic license stamp of a license. Siemens AG issues a license key for
license-protected software.
Low-voltage directive
EC directive for the safety of products operated with low voltage (50 to 1000 V AC, 70 to
1500 V DC) that do not come under other directives. Conformity is confirmed with the
CE symbol and the EC certificate of conformity.
Motherboard
The motherboard is the core of the computer. It is where data are processed and stored,
interfaces and peripherals are controlled and managed.
Operating system
Generic term for all functions that control and monitor execution of user programs, allocation
of resources to individual user programs and maintenance of the mode of operation in
interaction with the hardware (e.g. Windows 10).
Pixel
A pixel is the smallest element that can be displayed on a screen or printed on a printer.
Plug and Play
The use of plug and play enables a device to configure itself automatically to communicate
with I/O devices (e.g. screens, modems, and printers). Users can connect an I/O device (plug)
and then run it (play) without having to configure the system manually. A plug-and-play PC
requires a BIOS that supports plug and play and the expansion card must support the feature,
too.
POST
A self-test performed by the BIOS after the computer has been switched on that, for example,
examines the memory chips of the RAM or graphics card for possible errors. If errors are
found during the test procedure, the computer indicates this with audible signals and
displays the cause of the error on the screen.
138
7KN POWERCENTER 3000
Equipment Manual, 07/2020, L1V30579222003-03
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