Weidmuller SAI Active Universal Pro Series, Руководство пользователя

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Appendix
LED UQ3
Red/green LED for indicating the status of supply
voltage UQ3
Functions as LED U1
Low byte
Least-significant byte of a term consisting of two or
more bytes, for example, a software version num-
ber.
Please see High byte.
M12
Metric thread with a major diameter of 12 mm.
M12 socket (female connector)
A socket with cavities containing contacts for creat-
ing an electrical connection. Sockets are also re-
ferred to as female connectors. The mating partner
of a socket is referred to as the plug or male con-
nector. The socket outlet can be described as a
special form of socket.
M8
Metric thread with a minor diameter of 8 mm.
MNS
Module Network Status
NMT
Network Management Tool.The NMT enables the
initialisation and monitoring of network nodes.
OSI
Open Systems Interconnection
Output addresses
External signals in a PLC are exchanged via digital
or analogue inputs or outputs. These are controlled
by the PLC programme via the addresses. The ad-
dresses can be a combination of station address,
module address and connection address. It some-
times possible that the addresses can only be ac-
cessed byte for byte or word for word.
Output interval
Please see sampling period.
Parameter
Parameters describe the technical characteristics of
technical devices. Weidmueller SAI parameters
serve to activate the DESINA diagnostic input, to
define plug-in connectors as inputs or outputs as
well as define the analogue measurement ranges
as a current or voltage input.
Parameterisation
Term used to describe assigning parameters with a
parameterisation or programming tool.
PDO
Process Data Object. An object for the exchange of
process data between different devices.
PE
Please see Protective earth.
Peripheral devices
These are devices outside of a central processing
unit; with Fieldbus systems, this also applies to all
devices in the Fieldbus.
PLC
PLC stands for Programmable Logic Control.
Plug and Play
Sometimes written as Plug 'n' Play or Plug & Play; it
describes the characteristics of modern, mostly pe-
ripheral devices that are immediately available for
use without having to first install a programme.
Plug-in connectors
A plug-in connector connects lines carrying electri-
cal power or signals. On the one hand, the stan-
dards regulate the form and the contact assignment
of the connector and the corresponding mating
connector as well as defining the electrical signals
to be transmitted on the other hand.
Polling
The generally recognised term for "to poll" or query.
The poll function is an operating mode of Fieldbus
devices in a Fieldbus system.
Power supply
Electrical loads require a voltage supply to provide
the power. In control systems, the supply voltage
used is 24 VDC.
Please see voltage range.
PROFIBUS
(PROcess FIeld BUS) is a part of the international
standards IEC 61158 and IEC 61784. Physically,
PROFIBUS is either an electrical network based on
a shielded, two conductor cable or an optical net-
work based on a fibre optics cable.
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