Table of Contents
Advertisement
Glossary
A
Access mode
Active nodes
Address identifier
Arc suppression element
Array
B
Baud rate
Bus
Bus connector
Bus node
Bus segment
C
Chassis
Communication link
Communication reference
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
There are two access modes: read and write access
Can transmit data to other nodes or request data from other nodes
when they have a permission to send (= master station).
Combination of letters/digits identifying an ET 200U I/O module in
COM ET 200.
Components for reducing induced voltages. Induced voltages occur
when inductive circuits are de–energized.
A set of elements of the same type.
In the ET 200U(DP Standard/FMS), for example, multi–channel ana-
log modules are assigned the object code "array".
Data transmission speed: specifies the number of bits transmitted per
second (baud rate = bit rate)
Common transmission path for all nodes connected; with defined ter-
mination points.
Physical interface between node and bus cable.
Device that can send, receive or amplify data via the bus, e.g. master
station, slave station, repeater, active star hub, etc.
Segment
Chassis defines the entire range of interconnected dead inactive parts
of a device that are not subject to any dangerous touch voltages, even
in the case of a fault.
A communications link forms a logical interface between two bus
nodes. Their relationships are defined in the
links.
A communications link is established between two stations which need
to exchange data. Each station is therefore assigned at least one com-
munications link. These relationships are identified by numbers (so–
called communications references). A communications reference is
equivalent to an "internal address" of the station in layer 7.
B
list of communications
B-1
Advertisement
Table of Contents
