Rockwell Automation Publication 1794-UM061B-EN-P - March 2020 71
Configure Your Adapter and Digital Modules on a ControlNet Network        Chapter 6
Notice that the 1756-CNB Bridge is now on line, but the rest of the I/O 
configuration (adapter and I/O modules) connections are not scheduled (notice 
the yellow triangles).
Configure the 1794-ACN15 
Adapter
You have now built the I/O tree in RSLogix 5000, and the RSLogix 5000 
software used the chassis size from the 1794-ACN15 General Tab. Now you 
must download this new chassis size value into the 1794-ACN15 adapter 
hardware. This procedure will synchronize the chassis size value from the 
RSLogix 5000 software into the 1794-ACN15 adapter.
1. Highlight the 1794-ACN15 adapter, and right-click to choose Properties.
Verify the node address and the chassis size.