Rockwell Automation 5730 DriveLogix5730 Controller for PowerFlex 700S Drives with Phase II Control - Manual (Page 120)

6-16 Communicating with Devices on an EtherNet/IP Link
The producer and consumer must be configured correctly for the specified
data to be shared. A produced tag in the producer must be specified exactly
the same as a consumed tag in the consumer.
If any produced/consumed tag between a producer and consumer is not
specified correctly, none of the produced/consumed tags for that producer
and consumer will be transferred. For example, if a DriveLogix5730
controller is consuming three tags that another controller consumes but the
first tag is specified incorrectly, none of the tags are transferred to the
consuming DriveLogix5730 controller.
However, one consumer failing to access shared data does not affect other
consumers accessing the same data. For example, if the producing
DriveLogix5730 controller from the previous example also produced tags
for other consuming controllers but did so correctly, those tags are still
transferred to the additional consuming controllers.
Maximum Number of Produced and Consumed Tags
The maximum number of produced/consumed tags that you can configure
depends on the connection limits of the Ethernet port on the controller. You
can have a maximum of 32 connections through the Ethernet port.
Each produced tag uses one connection for the tag and the first configured
consumer of the tag. Each consumer thereafter uses an additional
connection.
If you have a lot of data to produce or consume, organize that data into an
array. An array is treated as one tag, so it uses only one connection. An
array can be as large as 488 bytes, which is also the limit of a produced or
consumed tag.
Size Limit of a Produced or Consumed Tag
A produced or consumed tag can be as large as 488 bytes, but it must also fit
within the bandwidth of the EtherNet/IP network.