Good morning Andy,

Thanks for your question!

In many cases, to share just the Analog Input Data values from one module owned by one Logix Controller with another Logix Controller, you would copy those values into an array and then message the array.

While this method requires a few instructions as well as an MSG, it's very efficient as you only send the data you need over the network, and not all the data the module produces.

There are some more advanced options, and probably the best is to add the Analog Input module owned by one Logix PAC to your other Logix PAC as “Listen Only,” but I don't have any lessons on that as of yet.

For more information on Listen Only, see page 30 in the below manual on Analog modules :
– https://literature.rockwellautomation.com/idc/groups/literature/documents/um/1756-um009_-en-p.pdf

Hope this helps!

Shawn Tierney,
Instructor at The Automation School