Siemens SENTRON 7KN POWERCENTER 3000 Manual page 94

Glossary
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 product 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.
92
7KN POWERCENTER 3000
Manual, 10/2019, L1V30579222003-01