Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 132)

Publication 1747-RM623D-EN-P - June 2006
E-54 Application Examples
The software attempts to communicate with all possible node
numbers on the network, from 1 to 99. The online network
screen appears. For this example, the screen should show node
99 as the programming terminal as shown.
The two 1747-SCNR scanners are nodes 1 and 2 on the
ControlNet network. For this example, a scheduled connection
is configured for the 1747-SCNR module at node 1 to write 50
words to the 1747-SCNR scanner at node 2 and the 1747-SCNR
scanner at node 2 writes 60 words to the 1747-SCNR scanner at
node 1 with another scheduled connection.
In other words, the 1747-SCNR scanner at node 1 produces 50
words of data, received from the SLC processor in its chassis,
and this data is consumed by the 1747-SCNR scanner at node 2.
Also, the 1747-SCNR scanner at node 2 produces 60 words of
data received from its processor and that data is consumed by
the 1747-SCNR scanner at node 1. This producer/consumer
model becomes more apparent when we actually create the
necessary scheduled connections.