Rockwell Automation Publication CNET-UM001F-EN-P - February 2018 75
Chapter 5
Produce and Consume Tags
(interlock controllers)
This chapter explains how to interlock (produce and consume tags)
controllers via a ControlNet network.
Terminology on page 75 71 on page 75
Set Up the Hardware on page 95 72 on page 95
Determine Connections for Produced and Consumed Tags
on page 77
73 on page 77
Organize Tags for Produced or Consumed Data on page 78 75 on page 78
Adjust for Bandwidth Limitations on page 79 76 on page 79
Produce a Tag on page 80 77 on page 80
Consume a Tag on page 83 79 on page 83
Interlocking controllers is the preferred method of sharing scheduled data
between controllers when data needs to be delivered regularly, quickly and at
a set interval.
A Logix 5000 controller lets you produce (broadcast) and consume (receive)
system-shared tags.
Term Definition
Produced tag A tag that a controller makes available for use by other controllers. Multiple
controllers can simultaneously consume (receive) the data. A produced tag sends
its data to one or more consumed tags (consumers) without using logic. The
produced tag sends its data at the RPI of the fastest consuming tag.
Consumed tag A tag that receives a produced tag’s data. The data type of the consumed tag must
match the data type, including any array dimensions, of the produced tag. The RPI
of the fastest consumed tag determines the rate at which the produced tag is
produced.
For two controllers to share produced or consumed tags, they must reside on
the same ControlNet network.
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