Eaton EASY222-DN, User Manual

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DeviceNet Communication
profile
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09/10 MN05013007Z-EN
DeviceNet Communication
profile DeviceNet is based on a connection-oriented communication
model. This means that the data can always only be
exchanged via the specific connections assigned to the
devices.
DeviceNet stations communicate either by means of I/O
messages or explicit messages.
I/O Messages
I/O messages are used to exchange high-priority process and
application data via the network. The communication
between the stations on the DeviceNet is implemented here
with the client/server model.
This means: a “producing”
application transfers data to one or several “consuming”
applications. It is entirely possible that several application
objects are addressed in a single device.
Prerequisite for communication between the units via I/O
messages is the implementation of an I/O Messaging
Connection Object. You can activate this function in two
ways:
• Either by means of a static and in the unit already existing
"l/O connection object" or via the “Predefined Master/
Slave Connection Set“, or
• by means of a dynamically set I/O connection object which
you can configure using an Explicit Messaging Connection
Object that already exists in the device.