Allen-Bradley Compact I/O 1769-ADN DeviceNet, User Manual

Page: 75 / 204

Publication 1769-UM001B-EN-P - October 2002
Configuring Your Compact I/O Series A DeviceNet Adapter 3-25
Using the Clear Memory Function
The Clear Memory feature is activated by choosing Reset
Configuration and Upload Actual Devices under the Reset tab. This
will return the 1769-ADN to the ‘No Adapter or I/O Configuration’
state (as if it never was configured for the 1769 modules) and cause
the software to pull the configuration from the actual devices.
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 3-22).
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.
IMPORTANT
The 1769-ADN is not configured with the actual
device configuration shown at this point. You must
choose Apply or OK to download the Series A
adapter and I/O configurations for the Compact I/O
system to be properly configured.
Allen-Bradley