Rockwell Automation 1747-AENTR SLC 500 EtherNet/IP Adapter User Manual - Manual (Page 12)

6 Rockwell Automation Publication 1747-UM076C-EN-E - January 2013
Chapter 1 About the SLC 500 EtherNet/IP Adapter
input modules are not polled by a controller. Instead, they produce (multicast or
unicast) their data periodically or at a cyclic rate.
Unicast is the default for version 20 with multicast as a selectable option. The
frequency of update depends upon the options chosen during configuration and
where on the network the input module resides. The input module, therefore, is a
producer of input data, and the controller is a consumer of the data.
The controller also produces data for other controllers to consume. The
produced and consumed data is accessible by multiple controllers and other
devices over the EtherNet/IP network. This data exchange conforms to the
producer and consumer model.
Support of Direct
Connections The EtherNet/IP adapter only supports direct connections. A direct connection
is a real-time data transfer link between a Logix controller and a 1746/1747 I/O
module through the 1747-AENTR adapter. Direct I/O connections occur at a
cyclic rate specified by the RPI during configuration.
The adapter can support direct connections to devices in expansion racks. This
feature is supported on Logix Designer application (previously RSLogix 5000
software) revision 21 and later, and firmware revision 2.001 and later.
See the EtherNet/IP Performance and Application Guide, publication number
ENET-AP001 , for more information on connections.
Chapter Summary This chapter provided an overview of the module features, what it does, and its
function in a Logix system.