Справочник Пользователя для Siemens 620
Glossary
Glossary-16
SIMATIC Box PC 620 Manual
A5E00131465-01
R
RAM
RAM (Random Access Memory) is a volatile read/write memory in which every
memory location can be addressed individually and its contents changed. RAM is
used to store data and programs.
memory location can be addressed individually and its contents changed. RAM is
used to store data and programs.
Rechargeable Battery
Reachargeable battery is used as a power source for laptop and notebook
computers independent of external power supply. It also prevents the loss of data
as a result of power failure.
computers independent of external power supply. It also prevents the loss of data
as a result of power failure.
Restart
Warm start of a computer in operate state without switching off the power supply
(Ctrl + Alt + Del).
ROM
ROM (Read Only Memory) is a non-volatile memory in which every memory
location can be addressed individually. They contain factory set programs and data
that are not lost in the event of a power failure.
location can be addressed individually. They contain factory set programs and data
that are not lost in the event of a power failure.
RS-232 Interface
The RS-232 interface is a standardized interface for data transmission. Printers,
modems and other hardware modules can be connected to a RS-232 interface.
modems and other hardware modules can be connected to a RS-232 interface.
RTC
Real Time Clock
S
SCSI Interface
Small Computer System Interface. Interface for connecting SCSI devices (hard
disk drives, CD-ROM drives).
disk drives, CD-ROM drives).
Serial Interface
Data is transmitted one bit at a time via a serial interface (port); serial interfaces
are therefore slower than parallel interfaces.
are therefore slower than parallel interfaces.