Allen-Bradley 1779-KFMR User Manual page 154

Chapter 10
At that point, a copy of Block A is in PLC-2/30 memory at Node 3.
To enable the 1779-KFM interface to send and receive remote command
control messages, you must set the communication-mode switches on the
host board to select the Native mode. (Refer to Chapter 4 for
switch-setting procedures).