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Terminology
1.8.
Description
Term
An abnormal state of a condition.
Alarm
An OPC service for providing information about alarms and
events to OPC clients.
Alarms and Events; AE
COM600 as a generic name for COM600S IEC and COM600F
ANSI products
COM600 Series; COM600
An OPC service for providing information about process data to
OPC clients.
Data Access; DA
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.
Data Object; DO
The data set is the content basis for reporting and logging. The
data set contains references to the data and data attribute val-
ues.
Data Set
A physical device that behaves as its own communication node
in the network, for example, protection relay.
Device
Change of process data or an OPC internal value. Normally, an
event consists of value, quality, and timestamp.
Event
A physical IEC 61850 device that behaves as its own commu-
nication node in the IEC 61850 protocol.
Intelligent Electronic Device
Representation of a group of functions. Each function is defined
as a logical node. A physical device consists of one or several
LDs.
Logical Device; LD
The smallest part of a function that exchanges data. An LN is
an object defined by its data and methods.
Logical Node; LN
Series of standards specifications aiming at open connectivity
in industrial automation and the enterprise systems that support
industry.
OPC
8
1MRS756738
COM600 series 5.1
Logic Processor User's Manual
Summary of Contents for COM600 series 5.1
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