ProSoft Technology ILX34-AENWG - Manual (Page 48)

About the Example Applications ILX34-AENWG ♦ Point I/O Platform
User Manual Wireless POINT I/O Adapter
Page 48 of 177 ProSoft Technology, Inc.
August 16, 2013
3.1 Support of Rack-optimized and Direct Connections
The ILX34-AENWG adapter supports both direct and rack-optimized
connections. A direct connection is a real-time data transfer link between the
controller and whatever module occupies the slot that the configuration data
references.
 Direct connection messaging occurs at a cyclic rate specified by the RPI
during configuration.
 A rack-optimized connection is a grouping of data from more than one I/O
module into a single block of data sent over a single connection at the same
data rate.
Rack-optimized connections reduce the total number of connections needed to
transfer data when using many I/O modules in a system. The following example
illustrates the benefit of rack-optimized connections.
For example, a system contains 8 digital I/O modules interfaced to a ILX34-
AENWG adapter. If you use direct connections to transfer data to each of these
I/O modules, you need 8 connections to transfer all of the data, one to each of
the 8 I/O modules. If you use a rack-optimized connection to transfer the data,
you only need a single connection - the connection to the ILX34-AENWG
adapter.
Important: Although rack-optimized connections offer an efficient way to use resources, there are
a few limitations on their use:

You can use only rack-optimized connections to send data to and from digital I/O modules.
Analog or specialty I/O requires direct connections.
 All data is sent at the same time as the RPI rate of the ILX34-AENWG adapter.
Refer to the Rockwell Automation publication EtherNet/IP Performance and Application Guide,
publication number ENET-AP001, for more information on connections.
3.1.1 Mix Rack-optimized and Direct Connections
You can mix communication formats for different I/O modules communicating
through the same adapter. I/O modules set up to use rack optimization
communicate at the rate of the RPI configured for the ILX34-AENWG adapter.
I/O modules configured for direct communication communicate at their own set
RPIs and ignore the ILX34-AENWG adapter's RPI.
3.2 System Components
We used the following components for the example applications. You need the
same or similar components to set up your own control system using POINT I/O
modules on an EtherNet/IP network.
Quantity Product Name Catalog Number
Hardware
1 Wireless POINT I/O Adapter ILX34-AENWG
1 POINT I/O 24V dc sink output
module 1734-OV4E/C