Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 84)

84 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 4 Configure the EtherNet/IP Network
Use Produce/Consume
Connections
Beginning with enhanced redundancy system, revision 19.053 or later, you can
use produce/consume connections over an EtherNet/IP network. Controllers
let you produce (broadcast) and consume (receive) system-shared tags.
Figure 21 - Example System Using Produced and Consumed Tags
These requirements exist when you use produced and consumed connections
over an EtherNet/IP network in an enhanced redundancy system, revision
19.052 or later:
• You cannot bridge produced and consumed tags over two networks. For
two controllers to share produced or consumed tags, both must be
attached to the same network.
• Produced and consumed tags use connections in both the controllers and
the communication modules being used.
• Because the use of produced and consumed tags uses connections, the
number of connections available for other tasks, such as the exchange of
I/O data, is reduced.
The number of connections available in a system depends on controller
type and network communication modules used. Closely track the
number of produced and consumed connections to leave as many as
necessary for other system tasks.
• You must configure both connections, that is, the connection between the
primary controller and the remote controller, and the connection between
the remote controller and the primary controller, for Multicast. However,
if the redundancy system is the producer, it can be Unicast, because that is
configured in the remote controller, which is allowed.
TIP When using 1756-L7x controllers in your system, you must use revision 19.053
or later.
CH2 CH1 OK CH2 CH1 OK
Primary Chassis Secondary Chassis
Controller 1
Produced Tag
Controller 2
Consumed Tag