Siemens SIMATIC Rack PC 840 Manual page 201

Plug and Play
Generally, a reference to the ability of a computer to automatically configure the
system for communication with peripheral devices (for example monitors, modems
or printers). The user can plug in a peripheral and "play" it at once without
manually configuring the system. The Plug and Play PC requires both a BIOS that
supports Plug and Play and a corresponding expansion card.
Power Button
The device can be switched on or off with the power button.
Power Management
The Power Management of a modern PC can regulate the consumption of energy
of the most important components of the computer (e.g. monitor, hard disk and
CPU) individually, while the current active operations will not be affected. This
function is particularly important for portable computers.
PROFIBUS
Bus system based on the PROFIBUS standard. Components of the SIMATIC S5
and S7 series (programming devices, programmable logic controllers,
programmable control systems, distributed I/Os) can be networked using
PROFIBUS.
Programmable Logic Controller System
The programmable logic controllers (PLC) of the SIMATIC S5 system consist of
one or more CPUs and various I/O modules. The PLCs of the SIMATIC S7 system
(for example, S7-200, S7-300, S7-400) consist of one or more CPUs and various
I/O modules.
Programmable Controller (AS)
This programmable controller (PLC) consists of the central unit, a CPU and of
diverse I/O modules.
Pull-Down Menu
See Drop-Down Menu
SIMATIC Rack PC 840 Manual
A5E00104826-03
Glossary
Glossary-15