Rockwell-automation 1785-Lx0C15 ControlNet PLC-5 Programmable Controll Manual de usuario descargar pdf (Pagina 43)

1785-UM022C-EN-P - February 2008

Planning to Use Your ControlNet PLC-5 Processor 2-5

The ControlNet system places your scheduled transfers in the first

part of each Network Update Interval (NUI). Time is automatically

reserved for network maintenance. Unscheduled transfers are

performed during the time remaining in the interval.

Unscheduled messaging on a ControlNet network is

non-deterministic. Your application and your configuration—number

of nodes, application program, NUT, amount of scheduled bandwidth

used, etc.—determine how much time there is for unscheduled

messaging.

Important: The ControlNet network reserves time for at least one

maximum-sized unscheduled transfer per NUI.

Depending on how much time there is for unscheduled

messaging, every node may not have a chance to send

unscheduled data every NUI.

You reserve a

specific amount

of time for all

scheduled

operations

Any time remaining is used

for unscheduled operations

The system

reserves time

for network

maintenance

One occurrence of the NUT is a NUI

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Rockwell-automation 1785-Lx0C15 ControlNet PLC-5 Programmable Controll Manual de usuario Pagina 43