12 Publication 1756-PM004C-EN-P - October 2009
Chapter 1 Communicate with I/O Modules
Ownership
In a Logix5000 system, modules multicast data. This means that multiple
devices can receive the same data at the same time from a single device.
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.
Listen-only connection 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 can only maintain a connection to the I/O module when
the owner controller is actively controlling the I/O module.
An owner connection is
any connection that does
not include Listen-Only
in its Comm Format.
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