ProSoft Technology inRAx 3170-PDP, Руководство пользователя

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3170-PDP ♦ FLEX Platform Glossary
FLEX I/O™ PROFIBUS Adapter
Page 132 of 152 ProSoft Technology, Inc.
August 23, 2007
CREF
communication reference. In FMS, an index assigned to each entry connection
defined in the CRL.
CSTAT
a qualifier that allows to save the status of a connection.
communication parameters
parameters within the PROFIBUS communication layers that control the
communication process. They are used to configure and indicate current status
of communication and consist of the OD, CRL, bus parameters for FMS, and
slave database and bus parameters for DP.
communication relationship
in FMS, defines all the parameters for the communication between two nodes.
configuration management
in FMS, set of FMA 7 services to upload and download the PROFIBUS bus
parameters, CRL, and to read SAP status and station identification.
connector header
a connector that attaches between the processor and coprocessor and provides
communication between the two modules.
connection type
in FMS, the type of connection between two nodes. There are three connection
types: defined (D), open at the responder (O), and open at the initiator (I)
connection zero
opens automatically during the coprocessor's power-up and allows access to
local data either by physical addressing or via objects defined locally in the OD.
consistency
the DP protocol allows to associate data consistency requirements with blocks of
data exchanged between a PLC master and its slaves. A consistent block of data
must always be written or read as a whole, because contained data is not
independent. For example, when it holds both real data and data identification, or
when granularity exceeds 2 bytes (for example, floating point data).
context management
set of FMA 7 services that establishes and releases connections