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Rockwell Automation Publication 1756-RM100F-EN-P - October 2018
Chapter 5
Standard Application Conversion
Produce and Consume Tags
The recommendations in this section provide techniques for establishing
produced or consumed tag communication between the following:
• 5580 and 5570 controllers
• 5380 and 5370 controllers
RPI of Multicast Tags
In version 27 or earlier projects, a produced tag produces data at the RPI of the
fastest requesting consumer. This let multiple consumers with different RPIs
successfully connect to a producer.
In version 28 or later projects, the first consumer of a produce tag determines
the RPI rate at which data is produced. All subsequent consumers must request
the same RPI value as the first consumer. Otherwise, the subsequent consumers
fail to connect.
When you migrate a Logix Designer project, version 27 or earlier, to a later
version of the application, verify that the multicast consumers of a produce tag
are configured properly in the original project.
Table 14
provides more
information.
Table 14 - Proper Configuration of Multicast Consumers of a Produced Tag
Consuming Controller
Producing Controller
Description
Any controller, version 17
or earlier
ControlLogix 5580 controller,
version 28 or later
Verify that all multicast consumed tags of a
produced tag are configured with the same RPI. If
they are not, some of the consumers can fail to
connect.
Any controller, version 18
or later
Verify that one of the following exists:
• All multicast consumers of a produced tag are
configured with the same RPI.
• All consumers are configured to Allow
Consumed Tags To Use RPI Provided By
Producer.
Any controller, version 20
or later
CompactLogix 5380
controller, version 28 or later
Verify that one of the following exists:
• All multicast consumers of a produced tag are
configured with the same RPI.
• All consumers are configured to Allow
Consumed Tags To Use RPI Provided By
Producer.