MESZ
Central European Summer Time
MN
Manual - Operation manual
Modulo
From the Latin modulo, i.e., "a small measure"
O
Object
Static or dynamic element used for engin-
eering 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
appearance 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 con-
nected devices.
OS
Operation System
P
PCMCIA
Personal Computer Memory Card Inter-
national Association (PCMCIA)
Peer to Peer (P2P)
Peer-to-peer is a term used for computers
that are connected to each other in an archi-
tecture in which both computers can assume
the role of server and client.
PELV (protective extra low voltage)
Protective low voltage that provides pro-
tection 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
protective 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.
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 depend-
ing on the application software being used,
intuitive operation that enables operators to
start working right away, and the fact that no
calibration is required
872
easyE402/24 MN050009ENEaton.com