Siemens Simatic 620 User Manual

Page 198

Glossary

Glossary-8

SIMATIC Box PC 620 Manual

A5E00131465-01

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).

Gender Changer

The Gender Changer is used to convert the COM1/V24/PLC interface of the

SIMATIC PC family to a common socket.

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.

Hibernate

See Dormancy.

HMI

Human Machine Interface

HTML

Hypertext Markup Language is the markup language used for documents on the
World Wide Web. HTML is an application of SGML (Standard Generalized Markup
Language) that uses tags to mark elements, such as text and graphics, in a
document to indicate how Web browsers should display these elements to the user
and should respond to user actions such as activation of a link by means of a key
press or mouse click.

HTTP

Hypertext Transfer Protocol is the protocol used to carry requests from a browser
to a Web server and to transport pages from Web servers back to the requesting
browser.