Produce and Consume a Tag
32 Rockwell Automation Publication 1756-PM011J-EN-P - February 2018
The following scenarios explain how producing and consuming tags
exchange RPI for controllers.
The RPI is within range of the producing controller’s RPI Limits.
There is no default RPI that is set up for the producing controller.
Version 17 and earlier: The consuming controller is brought online with an
RPI configured at 3 ms. The producer accepts the RPI requested by the
consuming tag. All controllers on the multicast connection will be increased
to 3 ms for the API, which is the interval the data is actually being produced.
Version 18 and later: The consuming controller is brought online with an
RPI configured at 3 ms. The producing controller verifies the requested RPI
by the consumer is within the RPI limits set up for the producer. Since the
request is within the range, the producing controller accepts the RPI of the
consumer.
Tip:
If you use all the default settings of version 18 and later, you have the
same behavior as version 17 and earlier.
consumed RPI
scenarios
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