Definitions And Abbreviations - ABB REPL-01 User Manual

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Definitions and abbreviations

CN
Controlled Node; A node in a POWERLINK network without the
ability to manage the SCNM mechanism.
Device Description File
All device-specific information is stored in the Device Description
File (XDD) of each device.
MN
Managing Node; A node capable of managing the SCNM
mechanism in a POWERLINK network.
Object Dictionary
A local storage of all communication objects recognized by the
device.
OSI
Open Systems Interconnection.
PDO
Process Data Object; Used for transmitting time critical data, such
as control commands, references and actual values.
PReq
PollRequest; A frame used in the isochronous phase of the cyclic
communication. With PollRequest, the MN requests the CN to
send its data.
PRes
PollResponse; A frame used in the isochronous phase of the
cyclic communication. The CN responses with a PollResponse
frame when it receives a PollRequest from the MN.
RO
Denotes read-only access.
Definitions and abbreviations
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