Siemens SIMATIC Series Operating Instructions Manual page 186

Glossary
The devices connected to a LAN are called nodes. The purpose of networks is the mutual
use of files, printers or other resources.
License key
The license key represents the electronic license stamp of a license. Siemens AG issues a
license key for each software that is protected by a license.
Motherboard
The motherboard is the core of the computer. Here, data are processed and stored, and
interfaces and device I/Os are controlled and managed.
Operating system
Generic term which describes all functions for controlling and monitoring user program
execution, distribution of system resources to the user programs and the operating mode in
cooperation with the hardware (for example Windows XP Professional).
Packet writing
The CD-RW is used as a disk medium. The CD can then be read only by packet writing
compatible software or has to be finalized. Finalization of a CD closes the CD within an
ISO9660 shell. You can still write to the CD-RW several times in spite of finalization. Not all
CD drives can read packet-written CDs . There are restrictions to using this method in
general data transfer.
PCIe
PCI-Express (Peripheral Component Interconnect Express) is an extension standard for
connection of I/O devices with the chipset of a main processor. PCIe is the successor of PCI,
PCI-X and AGP and offers a higher data transmission rate in comparison to its
predecessors.
PIC mode
Peripheral interrupt controller. 15 interrupt lines are available.
PROFIBUS, MPI
Process Field Bus (standard bus system for process applications)
PROFINET
PROFINET is the name of the standard for Industrial Ethernet developed and maintained by
the PROFIBUS user organization. PROFINET unites protocols and specifications with which
Industrial Ethernet meets the requirements of industrial automation technology.
186
Operating Instructions, 04/2020, A5E49948632-AA
SIMATIC IPC547G