Rockwell Automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter - Manual (Page 109)

Publication 1769-UM001B-EN-P - October 2002
Configuring Your Compact I/O Series B DeviceNet Adapter 4-33
Configured 1769-ADN
Powerup Behavior On powerup, the 1769-ADN, with a previous valid configuration, will
compare the saved system keying configuration with the actual
devices to determine if all of the keys match the actual devices (as
defined in the Comparison Feature section on page 4-29).
If they match, the 1769-ADN will complete the configuration of all I/O
modules and then wait for a DeviceNet master/scanner to make a
connection. If any of the keys do not match, the 1769-ADN will not
permit a DeviceNet master/scanner to make an I/O connection and
will wait for a valid configuration.