Siemens PC 670 Manuel D’Utilisation
Glossary
Release 04/02
Glossary-3
Panel PC 670 Computing Unit, Equipment Manual
Interrupt
Discontinuation in the processor of a programmable controller by an interrupt
event.
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.
connected.
L
LPT 1 port
The LPT 1 port (Centronics interface) is a parallel interface which can be used for
attaching a printer.
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.
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.
from here, and interfaces and device peripherals are controlled and managed.
Mouse port
PS/2 mouse connector.