Siemens PCIL43 IT networks, Legacy USB support, License key diskette, LPT port, Main memory

Glossary

IT networks

Networks for Information technology

LAN

Local Area Network is a local network that consists of a group of computers and other devices that are distributed across a relatively restricted range and are linked with communication cables. The devices connected to a LAN are called nodes. The purpose of networks is the mutual use of files, printers or other resources.

Legacy USB support

Support of USB devices (e.g. mouse, keyboard) on the USB ports without driver.

License key

The license key represents the electronic license stamp of a license. Siemens provides the license keys for protected software.

License key diskette

The license key diskette contains the authorizations or license keys required to enable protected SIMATIC software.

LPT port

The LPT1 port (Centronics port) is a parallel interface that can be used to connect a printer.

Main memory

This is a RAM area in the CPU which is accessed by the processor during user program execution.

Main menu

Usually the main menu/initial menu of a program.

Memory Card

Memory cards in credit card format. Memory for user programs and parameters, for example, for programmable modules and CPs.

Module

Modules are plug-in units for PLCs, programming device or PCs. They are available as local modules, expansion modules, interfaces or mass storage (Mass storage module).

SIMATIC Rack PC IL 43	Glossary-5
Operating Instructions, Edition 09/2005, A5E00432875-01