Eaton easyE4 series Manual page 618

OS
Operation System
P
PCMCIA
Personal Computer Memory Card International
Association (PCMCIA)
Peer to Peer (P2P)
Peer-to-peer is a term used for computers that
are connected to each other in an architecture
in which both computers can assume the role
of server and client.
PELV (protective extra low voltage)
Protective low voltage that provides protection
against electric shock. It refers to how
machines are electrically installed – one side of
the circuit or a point on the PELV circuit's
power source needs to be connected to the pro-
tective bonding circuit.
Personal computer
A personal computer is made up of a central
processing unit, RAM, external data storage
devices, an operating system, and application
programs, and is connected to peripheral
devices (monitor, printer). PCs can be sta-
tionary or portable.
Personal Computer Memory Card International
Association (PCMCIA)
PCMCIA Card, also known as PC Card, is a
standard for the expansion cards for portable
computers used in Eaton touch panels. PCMCIA
cards are energy-efficient and support hot plug-
ging, i.e., they can be replaced during ongoing
operation. Plug and play is supported thanks to
the fact that all the properties required in order
to automatically configure the driver are stored
on the card's CIS.
PID controller
Proportional–Integral–Derivative Controller
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easyE4 11/18 MN050009 EN www.eaton.com
PLC
Programmable logic controller The controller or
peripheral that is connected to the HMI.
Polling
Cyclical reading of the PLC's addressed vari-
ables
Port
Ports can be seen as virtual mailboxes for data
packets. A computer can communicate with
other computers on 65536 different ports.
Projected capacitive touch
A display designed for high precision, user
friendliness, and durability. It is designed to
bring the controls that have now become pre-
valent in consumer electronics to machines,
with advantages such as a gesture-based user
interface, two-finger multi-touch depending on
the application software being used, intuitive
operation that enables operators to start work-
ing right away, and the fact that no calibration is
required
PU
Polyurethane
R
Registers
Subpages in a dialog box or object
Retention
Refers to the ability of operands to retain their
value (memory contents) in the event of a loss
of voltage
ROM (read-only memory)
Non-volatile read-only memory
Router
Routers are devices used to forward ("route")
requests from a network to the Internet (or to
another network). Routers provide a measure
of security for private networks, as nodes