Rockwell Automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual - Manual (Page 66)

Publication 1794-UM061A-EN-P - July 2006
64 Configure Your Adapter and Digital Modules on a ControlNet Network
Ownership
In a Logix5000 system, modules multicast data. This means that multiple
modules can receive the same data at the same time from a single module.
When you choose a communication format, you have to choose whether to
establish an owner or listen-only relationship with the module.
owner controller The controller that creates the primary configuration and communication connection to a module. The owner
controller writes configuration data and can establish a connection to the module. The owner controller is
the only device that controls the outputs.
An I/O connection where another controller owns/provides the configuration data for the I/O module. A
controller using a listen-only connection only monitors the module. It does not write configuration data and
con only maintain a connection to the I/O module when the owner controller is actively controlling the I/O
module.