Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 112)

G–2
Publication 1794ĆUM057B-EN-P - November 2001
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 (e.g.
floating point data).
context management
set of FMA 7 services that establishes and releases
connections
CRL
Communication Relationship List. In FMS, a CRL is a
database within the station, holding the description of all
communication relationships of that station to all other
stations, independent of the time of use. For more
information on CRLs, refer to DIN 19245 Part 2: Process
Field Bus.
default settings
values used for communication configuration data such as
OD, CRL ( for FMS) DP slave database,and bus parameters
whenever the coprocessor’s working RAM configuration is
reinitialized.