Terminology - ABB COM600 User Manual

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Station Automation COM600 3.4
DNP 3.0 LAN/WAN Slave (OPC) User's Manual

Terminology

The following is a list of terms associated with COM600 that you should be familiar
with. The list contains terms that are unique to ABB or have a usage or definition that
is different from standard industry usage.
Term
Alarm
Alarms and Events; AE
Data Access; DA
Data Object; DO
Data Set
Device
Event
Intelligent Electronic Device
Logical Device; LD
Logical Node; LN
LON
LON Application Guideline for
substation automation; LAG
OPC
OPC item
Property
Report Control Block
Description
An abnormal state of a condition.
An OPC service for providing information about alarms and
events to OPC clients.
An OPC service for providing information about process data to
OPC clients.
Part of a logical node object representing specific information,
for example, status, or measurement. From an object-oriented
point of view, a data object is an instance of a class data object.
DOs are normally used as transaction objects; that is, they are
data structures.
The data set is the content basis for reporting and logging. The
data set contains references to the data and data attribute val-
ues.
A physical device that behaves as its own communication node
in the network, for example, protection relay.
Change of process data or an OPC internal value. Normally, an
event consists of value, quality, and timestamp.
A physical IEC 61850 device that behaves as its own commu-
nication node in the IEC 61850 protocol.
Representation of a group of functions. Each function is defined
as a logical node. A physical device consists of one or several
LDs.
The smallest part of a function that exchanges data. An LN is
an object defined by its data and methods.
A communication protocol developed by Echelon.
A proprietary method of ABB on top of the standard LON pro-
tocol.
Series of standards specifications aiming at open connectivity
in industrial automation and the enterprise systems that support
industry.
Representation of a connection to the data source within the
OPC server. An OPC item is identified by a string <object
path>:<property name>. Associated with each OPC item are
Value, Quality, and Time Stamp.
Named data item.
The report control block controls the reporting processes for
event data as they occur. The reporting process continues as
long as the communication is available.
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