Rockwell Automation 1756-SYNCH ControlLogix SynchLink Module User Manual - Manual (Page 135)

Publication 1756-UM521C-EN-P - July 2004
Glossary 3
Inhibit
A ControlLogix process that allows you to configure a SynchLink
module but prevent it from communicating with the owner controller.
In this case, the controller does not establish a connection.
Hub
Distribution unit in the star configuration that consists of a single base
block and up to 4 splitter blocks. Unidirectional data passes through
the hub.
Listen-only connection
An I/O connection that allows a controller to monitor I/O module
data without owning the module.
Major revision
A module revision that is updated any time there is a functional
change to the module resulting in an interface change with software.
Master node
A node in any SynchLink configuration that serves as the Time Master.
Minor revision
A module revision that is updated any time there is a change to the
module that does not affect its function or software user interface
(e.g. bug fix).
Owner controller
The controller that creates and stores the primary configuration and
communication connection to a module.
Receive port communications format
The communications format used in a ControlLogix SynchLink module
for all data the module receives on its fiber optic receive port.