Technical data

Glossary
Glossary-6
SIMATIC Box PC 620 Manual
C79000-G7076-C639-02
Function Keys
Function keys can be divided into two different types; the normal function keys
which are assigned a particular function of the computer (for example, delete key),
and programmable function keys (softkeys).
G
Gender Changer
Using the gender changer (25 pin / 25 pin), the COM1/V24/AG SIMATIC PC family
port can be converted to the usual 25-pin male connector.
H
Hard Copy
The output of the complete contents of the screen on a printer is called a hard
copy.
Hard Disk Drive
Hard disk drives (Winchester drives) are a form of magnetic disk memory where
the magnetic disks are permanently built into the drive.
HMI
Human Machine Interface
I
Interface
 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.
Interface Module
Module used to connect the hardware I/O.