Siemens SIMATIC PG 720, Руководство пользователя

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Glossary-6
PG 720 Programming Device
C79000-G7076-C720-02
(Japanese Electronics Industry Development Association) Association of
Japanese electronics manufacturers whose aim is to set up standards
worldwide for the miniaturization and flexible application of PC expansion
cards. Cooperates with PCMCIA.
The keyboard is the collection of keys which are used to input data, text,
characters, letters, numbers, special characters and control commands in a
computer. The keyboard forms the input interface between the user and the
computer.
Light-emitting diode (for display and indicating purposes).
The LPT1 port (Centronics port) is a parallel interface that can be used to
connect a printer.
The main memory is the complete RAM memory of a programming device.
Memory submodule in credit-card format containing RAMs or EPROMs.
Communications device that enables a computer to send and receive data
over a telephone line. Modulator and demodulator of a signal transmission
facility. It converts the digital pulses from a computer into analog signals
(and vice versa).
Modules are boards (printed-circuit boards) which can be plugged into a
programmable controller or programming device. They are available, for
instance, as central controller modules, interface modules or as bulk memory
modules.
The monitor or screen is a visual display unit via which the programming
device communicates with the user.
J
JEIDA
K
Keyboard
L
LED
LPT1 Port
M
Main Memory
Memory Card
Modem
Module
Monitor
Glossary