Description
Term
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
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.
OPC item
Named data item.
Property
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.
Report Control Block
ABB proprietary communication protocol used in substation
automation.
SPA
Protection and/or Control Product supporting the SPA protocol
version 2.5 or earlier.
SPA device
XML-based description language for configurations of electrical
substation IEDs. Defined in IEC 61850 standard.
Substation Configuration Lan-
guage; SCL
13
COM600 series 5.0
1MRS758690
Master Protocols (Ethernet) and Applications Technical Refer-
ence Manual
Summary of Contents for COM600 series 5.0
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