Siemens simatic ET 200SP User Manual page 109

Interface
● Connection between individual hardware elements such as PCs, programming device,
printer or screen by means of physical plug-in connections (cables).
● Connection between different programs to allow them to be used together.
LAN
Local Area Network: LAN refers to a local network consisting of a group of computers and
other devices which are distributed over a relatively restricted area and connected through
communication lines. The devices connected to a LAN are referred to as nodes. The
purpose of networks is the shared use of files, printers or other resources.
License key
The license key is the electronic license stamp of a license. Siemens AG provides a license
key for software that is protected by licensing laws.
Operating system
Generic term which describes all functions for controlling and monitoring user program
execution and distribution of system resources to the user programs as well as maintenance
of the operating mode in cooperation with the hardware.
Power options
The power options can be used to reduce the power consumption of the computer while still
keeping it ready for immediate use. Can be configured in Windows via Settings > Control
Panel > Power Options.
Restart
Restart of an already running computer which is performed without switching off the power
supply, for example using the key combination <Ctrl + Alt + Del>.
Restore DVD
You use the Restore DVD to reset your system partition or the entire hard disk to the delivery
state in the event of an error. The DVD contains all the image files required and is bootable.
ROM
Read Only Memory. ROM refers to a read-only memory where each memory location can be
addressed individually. The stored programs or data are hard-coded and are preserved even
in the event of a power failure.
CPU 1515SP PC
Manual, 12/2014, A5E32701806-AA
Glossary
109