DURAG D-ISC 100 2 Series User Manual

16 Glossary
204
D-ISC 100 x xx2
ues and parameters are also performed us-
ing the keypad. The keypad can also per-
form the inputs from the on-screen key-
board.
Measurement display after system start
[Measurement display after system start]
refers to the selection of the measured
value/status display to be shown after the D-
ISC 100 is started up. This selection can be
taken from the current Measurement dis-
play.
Modbus RTU
(RTU: RemoteTerminalUnit ) The Modbus
protocol is a communications protocol that is
based on a master/slave or client/server ar-
chitecture. Modbus has become a de facto
standard in industry, as it is an open-source
protocol. A master (e.g. a PC) and several
slaves (e.g. measurement and control sys-
tems) can be connected using Modbus.
Modbus TCP
Modbus TCP is very similar to the Modbus
RTU, but TCP/IP packages are used to sub-
mit the data.
On-screen keyboard
The term "On-screen keyboard" denotes the
display of a virtual keyboard on the display
screen of the Universal control unit D-ISC
100. The individual keys of this keyboard
are selected and activated using the arrow-
and Enter keys on the membrane keyboard
for this unit.
PLC (SPS)
Programmable Logic Controller. A Program-
mable Logic Controller is a device that is
used for controlling or regulating and which
is programmed on a digital basis. For some
years now, in many areas the PLC has su-
perseded the "hard-wired" programming of
control systems. When programmed with
suitable software this task can also be un-
dertaken by a (mobile) PC.
PLS
Process control system
PROFIBUS DP V0
(DP = decentralised periphery) is used to re-
quest and operate sensors (for example) by
a central control unit. The connection of
"distributed intelligence", i.e. the linking of
several control units to each other, can also
be implemented using PROFIBUS DP. V0
stands for the protocol defined in 1993. This
describes the cyclical exchange of data and
diagnostics. Primarily devices in general
automation technology and machine control
support this range of functions.
RS485 serial interface
has been - similarly to the RS 422 interface
- developed for serial high-speed data trans-
fer over long distances and is becoming in-
creasingly widespread in the industrial sec-
tor. The data cables must be laid as twisted
pairs.
Screen key
D-ISC 100 membrane keyboard; changing
over between the various displays
Signal range
The signal range specifies the limits within
which a measured value from a specific
device may occur. If the signal is outside
these limits, the measured value cannot be
defined. If the measured value lies outside
the signal range, the variations can no
longer be precisely measured.
TCP
The Transmission Control Protocol is a net-
work protocol. IT defines the manner in
which data is to be exchanged over a net-
work. Most current operating systems are
TCP-capable and use it to exchange data
with other computers. The protocol is part of
the internet protocol family, which are funda-
mentally used in the internet. This connec-
tion allows data to be transmitted in both dir-
ections. In most cases, TCP uses the

DURAG D-ISC 100 2 Series Specifications

General

Brand	DURAG
Model	D-ISC 100 2 Series
Category	Control Unit
Language	English