Rockwell-automation 1734-ACNR POINT I/O ControlNet Adapter User Manual Instrukcja Użytkownika Pobierz pdf (Strona 10)

Publication 1734-UM008B-EN-P - August 2005

Preface P-4

Terminology

The following table lists ControlNet terminology used throughout this

manual.

Term Meaning

Actual Packet Interval (API) The measure of how frequently a specific

connection produces its data.

Connection ID (CID) An identifier assigned to a transmission

that is associated with a particular

connection between producers and

consumers that identifies a specific piece of

application information.

Network Update Time (NUT) Repetitive time interval in which data can

be sent on the link.

Requested Packet Interval (RPI) The measure of how frequently the

originating application requires the

transmission of data from the target

application.

Scheduled Data transfers that occur in a deterministic

and repeatable manner on predefined NUTs.

Unconnected Service The messaging service that does not rely on

the set-up of a connection between devices

before allowing information exchanges.

Unscheduled Data transfer that use the remaining time in

the NUT after the scheduled transfers have

been completed.

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