Siemens SIMATIC PG 760 PII Manual page 111

I
Interface
(Port)
Interface Module Module which controls and extends the hardware periphery.
Interrupt
The interruption of program processing in the processor of a programmable
controller by an interrupt event.
IRQ Interrupt Request
ISA
Industrial Standard Architecture
K
Keyboard The keyboard is a collection of keys which are used to input data, text,
characters, letters, numbers, special characters and control commands in a
computer. The keyboard forms the input interface between the user and the
computer.
L
LED
Light-emitting diode (for display and indicating purposes).
LPT1 Port
The LPT1 port (Centronics port) is a parallel interface that can be used to
connect a printer.
M
Main Memory
The main memory is the complete RAM memory of a programming device.
Memory Card
Memory submodule in credit-card format containing RAMs or EPROMs.
PG 760 PII Programming Device
C79000-G7076-C766-01
An interface is the connection between individual hardware elements
such as PLCs, programming devices, printers or monitors via physical
connections (cables).
An interface is also the connection between different programs, to enable
them to work together.
Glossary
Glossary-5