B&R Industries Automation PC 620, User Manual

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Appendix A • Glossary
Automation PC 620 User's Manual V 1.90
Switch
Device, similar to a hub, that takes data packets received in a network and, unlike a hub, does
not pass them on to all network nodes, instead only to the respective addressee. Unlike a hub,
a switch provides targeted communication within a network that only takes place between
sender and receiver. Other network nodes are not involved.
SXGA
Abbreviation for Super Extended Graphics Array. Graphics standard with a screen resolution of
1280 × 1024 pixels (aspect ratio 5:4).
SXGA+
Abbreviation for SXGA Plus; Generally 1400 × 1050 pixels.
System units
Provit system units consist of a mainboard (without processor), slots for RAM modules, VGA
controller, serial and parallel interfaces, and connections for the FPD, monitor, PS/2 AT
keyboard, PS/2 mouse, USB, Ethernet (for system units with Intel Celeron and Pentium III
processors), Panelware keypad modules and external FDD.
Task
Program unit, which is assigned a specific priority by the real-time operating system. It contains
a complete process and can consist of several modules.
TCP/IP
Transmission Control Protocol/Internet Suit of Protocols; Network protocol, generally accepted
standard for data exchange in heterogeneous networks. TCP/IP is used both in local networks
for communication between various computer and also for LAN to WAN access.
TFT display
An LCD (Liquid Crystal Display) technology where the display consists of a large grid of LCD
cells. Each pixel is represented by a cell, whereby electrical fields produced in the cells are
supported by thin film transistors (TFT) resulting in an active matrix. In the simplest form, there
is exactly one thin film transistor per cell. Displays with an active matrix are generally used in
laptops and notebooks because they are thin, offer high quality color displays and can be viewed
from all angles.
Touch screen
Screen with touch sensors for activating an item with the finger.
T