ProSoft Technology 3170-PDP - Manual (Page 131)

Glossary 3170-PDP ♦ FLEX Platform
FLEX I/O™ PROFIBUS Adapter
ProSoft Technology, Inc. Page 131 of 152
August 23, 2007
8 Glossary
This Glossary contains terms specific to 3170-PDP and PROFIBUS FMS and
DP.
Rockwell Automation communication defaults
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 reinitialised.
application layer
the seventh layer of the seven-layer OSI reference model. This layer is where the
coprocessor first interacts with the application program.
baud rate
the speed of communication between devices on the network. All devices must
communicate at the same rate.
broadcast relationships
allow transmission of messages to all nodes simultaneously, but only
unconfirmed services are available.
bus parameters
communication parameters used by Link Layer. Main Bus Parameters are station
address, maximum address and baud rate. These can be changed using the
Local Station Manager or PROFIBUS Manager.
client
the FMS device that makes use of resources to perform some type of application
function.
CLOSE command
in FMS, terminates the connection with a remote node on the network.
communication object model
describes the externally visible behavior associated with an FMS service or
group of services. Three types of communication object models are domain
objects, program invocation objects and variable objects.