Eaton easyE4 Manual page 744

O
Object
Static or dynamic element used for engineering
purposes. Static objects are located in the
view's background and do not change at
runtime. In contrast, dynamic objects are loc-
ated in the view's foreground, and their appear-
ance can change as a result of data changes.
Operating system
A group of programs that control and manage
the processes in a computer and its connected
devices.
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.
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easyE4 10/19 MN050009 EN www.eaton.com
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
PLC
Programmable logic controller The controller or
peripheral that is connected to the HMI.
PLC(S)
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