Siemens SIMATIC Panel PC 870 Equipment Manual page 140

I
Interface module
Module for connecting hardware I/O.
Interface, multipoint
The multipoint interface (MPI) is the SIMATIC PC interface to the SIMATIC S7/M7.
This enables programmable modules, (module, programmable), text displays and
operator panels to be reached from a central point. The nodes on the MPI can
communicate with each other.
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.
M
Main memory
Main memory is the whole RAM on a SIMATIC PC.
Panel PC 870 Computing Unit Equipment Manual
Edition 12/01
Glossary
Glossary-3