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What are the synchlink configurations, What are the synchlink configurations? -6, Star configuration -6 – Rockwell Automation 1756-SYNCH ControlLogix SynchLink Module User Manual User Manual

Page 26: Star configuration

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Publication 1756-UM521C-EN-P - July 2004

2-6 Time Synchronization in the ControlLogix System

What are the SynchLink
Configurations?

SynchLink communications are a unidirectional data transfer from one
SynchLink node to another. Each configuration starts with a single
Master Node. The SynchLink network can be configured in the
following ways.

Star Configuration
Daisy Chain Configuration
Ring Configuration

Do not mix the configurations (i.e. begin in the star configuration and
change to the daisy chain configuration). Examples of these
configurations are shown in the following sections.

Star Configuration

The star configuration transfers data from a Master Node through
Hubs to End Nodes.

Figure 2.5

For an example of how to configure a Star configuration, see Appendix B.

Master Node

ControlNet

SynchLink

42747

End Node

End Node

End Node

End Node

End Node

End Node

Hub

Hub

Hub

IMPORTANT

The star configuration supports 2 layers of hubs with
up to 16 end nodes connected to each hub.

A maximum of 257 SynchLink modules (including
the Master Node) can be connected in the star
configuration.