Справочник Пользователя для Siemens 620

Glossary-5

SIMATIC Box PC 620  Manual

A5E00131465-01

Integrated hardware and software controllers that control the functions of certain

internal or peripheral devices (for example, the keyboard controller).

Collective term for mouse pointer and text cursor.

Keypad on the keyboard for controlling the cursor.

Direct Current. Unidirectional electrical current.

Dual Inline Memory Module. Memory RAM chips that are installed on the PCB,

similar to the more common SIMM (Single Inline Memory Module) chips. The

DIMM with its 64-bit data bus architecture has connections on both sides which are

connected to different circuits for processing different instructions. SIMMs,

however, have a 32-bit data bus architecture where all lines are connected to the

same circuit for processing the same instructions. DIMMs can be installed in the

computer as single chip, SIMMs, on the contrary, only in pairs.

The configuration of a programming device contains information on hardware and

device options, such as memory configuration, drive types, monitor, network

address, etc. The data are stored in a configuration file and enable the operating

system to load the correct device drivers and configure the correct device

parameters.
If changes are made to the hardware configuration, the user can change entries in
the configuration file using the SETUP program.

The disk drive (floppy disk drive) is used to store programs and data on diskette

(write access) or to load from diskette to the computer (read access).