B&R Automation PC 620, User Manual

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Appendix A • Glossary
Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
PnP
An abbreviation for " P lug and P lay". Specifications developed by Intel. Using Plug and Play
allows a PC to automatically configure itself so that it can communicate with peripheral devices
(e.g. monitors, modems, and printers). Users can connect a peripheral device (plug) and it
immediately runs (play) without having to manually configure the system. A Plug and Play PC
requires a BIOS that supports Plug and Play and a respective expansion card.
POH
An abbreviation for " P ower O n H ours". See MTBF.
POST
An abbreviation for " P ower- O n S elf T est". A set of routines that are stored in ROM on the
computer and that test different system components, e.g. RAM, disk drive and the keyboard in
order to determine that the connection is operating correctly and ready for operation. POST
routines notify the user of problems that occur. This is done using several signal tones or by
displaying a message that frequently accompanies a diagnosis value on the standard output or
standard error devices (generally the monitor). If the POST runs successfully, control is
transferred over to the system's bootstrap loader.
POWERLINK
An enhancement of standard Ethernet. It enables data exchange under strict real-time
conditions with cycle times down to 200 µs and jitter under 1 µs. This makes Ethernet power
available on all communication levels of automation technology – from control levels to I/O.
POWERLINK was initiated by the company B&R Industrie-Elektronik and is now managed by
the open end user and vendor association, EPSG - Ethernet POWERLINK Standardization
Group (
www.ethernet-powerlink.org ).
QVGA
Abbreviation for " Q uarter V ideo G raphics A rray". Usually a screen resolution of 320 × 240 pixels.
QUXGA
Abbreviation for " Q uad U ltra E x tended G raphics A rray". Generally a screen resolution of 3200
× 2400 pixels (4:3). Quad implies the 4x greater pixel resolution compared to the UXGA.
QWUXGA
Abbreviation for " Q uad WUXGA" ; Generally a screen resolution of 3840 × 2400 pixels (8:5,
16:10).
Q