Siemens Simatic 620 Owner's Manual page 199

Hub
In a network, a device joining communication lines at a central location, providing a
common connection to all devices on the network. The term is an analogy to the
hub of a wheel.
Hyperlink
A connection between an element in a hypertext document, such as a word,
phrase, symbol, or image, and a different element in the document, another
document, a file, or a script. The user activates the link by clicking on the linked
element, which is usually underlined or in a color different from the rest of the
document to indicate that the element is linked.
I
IDE
Integrated Device Electronics is a type of disk–drive interface in which the
controller electronics reside on the drive itself, eliminating the need for a separate
adapter card.
Infrarot
Acronym: IR. Having a frequency in the electromagnetic spectrum in the range just
below that of red light. Objects radiate infrared in proportion to their temperature.
Industrial Ethernet
Bus system based on the Ethernet standard. Components of the SIMATIC S5 and
S7 series (programming devices, programmable logic controllers, programmable
control systems) can be networked using Industrial Ethernet NICs.
Interface module
Module for the connection of peripheral hardware.
Interrupt
When the processor receives an interrupt, it suspends its current operations, saves
the status of its work, and transfers control to a special routine known as an
interrupt handler. This routine processes an instruction set to deal with the
particular situation that caused the interrupt. Interrupts can be generated by
various hardware devices to request service or report problems.
SIMATIC Box PC 620 Manual
A5E00131465-01
Glossary
Glossary-9