Connections for Standard I/O Modules
A connection is a real-time data transfer link between the owner-controller and the
module that occupies the slot that the configuration references.
During the module configuration, the connection type determines what data is exchanged
between the controller and the module. When you uninhibit a module in online mode, or
download the project with modules that are uninhibited to the controller, the controller
attempts to establish a connection to each module.
The owner-controller monitors its connection with a module. Any break in the connection,
for example, the loss of power to the PointMax I/O system, causes a fault. The Studio
5000 Logix Designer application can monitor the fault status tags to indicate when a
fault occurs on a module.
Producer/Consumer Communication
PointMax I/O modules use the Producer/Consumer communication model to produce data
without a controller polling them first. The modules produce the data and
controllers consume it. That is, the owner-controller and controllers with a Listen
Only connection to the module can consume it.
When an input module produces data, the controllers can consume the data
simultaneously. Simultaneous data consumption eliminates the need for one controller
to send the data to other controllers.
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