Siemens PC 670 manual Interrupt, Keyboard port, LPT 1 port, LS 120 drive, Main memory, Motherboard

Release 04/02 Glossary

Interrupt

Discontinuation in the processor of a programmable controller by an interrupt event.

IRQ

Interrupt request.

ISA

Industrial Standard Architecture (bus for expansion board)

K

Keyboard port

PS/2 keyboard connector Keyboards with an integrated trackball can be connected.

L

LPT 1 port

The LPT 1 port (Centronics interface) is a parallel interface which can be used for attaching a printer.

LS 120 drive

The LS 120 drive is compatible with the familiar 3.5” floppy disk drive. The LS 120 drive supports both standard floppy disks (1.44 MB) and superdisks with a capacity of up to 120 MB.

M

Main memory

Main memory is the whole RAM on a SIMATIC PC.

Motherboard

The motherboard is the heart of SIMATIC PCs. Data are processed and saved from here, and interfaces and device peripherals are controlled and managed.

Mouse port

PS/2 mouse connector.

Panel PC 670 Computing Unit, Equipment Manual Glossary-3