B&R Industries Provit 5000, Руководство пользователя

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Provit 5000 User’s Manual 367
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Technical Appendix • Glossary
COM1
Device name for the first serial port in a PC system. The input-output area for COM1 is usually
found at address 03F8H. Generally, the COM1 port is assigned IRQ 4. In many systems, an
RS232 serial mouse is connected to COM1.
COM2
Device name for the second serial port in a PC system. The input-output area for COM2 is
usually found at address 02F8H. Generally, the COM2 port is assigned IRQ 3. In many systems,
a modem is connected to COM2.
COM3
Device name for a serial port in a PC system. The input-output area for COM3 is usually found
at address 03E8H. Generally, the COM3 port is assigned IRQ 4. In many systems, COM3 is
used as an alternative for COM1 or COM2 if peripheral devices are already connected to COM1
and COM2.
Compact IPC
The B&R Compact IPC is a very cost effective industrial PC with an integrated 10.4" TFT touch
display. It is also known as the IPC2002.
Controller
A device component which allows access to other devices on a computer subsystem. A disk
controller, for example, allows access to hard disks and disk drives and is responsible both for
physical and logic drive access.
CPU
An abbreviation for »Central Processing Unit« Interprets and executes commands. It is also
known as a "microprocessor" or "processor" for short. A processor is able to receive, decode and
execute commands, as well as transfer information to and from other resources via the computer
bus.
CRT
An abbreviation for »Cathode Ray Tube« The main component of a television set or a standard
computer screen. A cathode ray tube consists of a vacuum tube, in which one or more electron
guns are installed. Each electron gun creates a horizontal electron beam, which appear on the
front of the tube (the screen). The inner surface of the screen is coated with phosphor, which is
lit when hit by the electrons. Each of the electron beams move in a line from top to bottom. In
order to prevent flickering, the screen content is updated at least 25 times per second. The
sharpness of the picture is determined by the number of pixels on the screen.