Rockwell Automation 1769-SDN Compact I/O DeviceNet Scanner Module User Manual - Manual (Page 109)

Publication 1769-UM009E-EN-P - August 2009 109
Use the 1769-SDN Scanner Module with MicroLogix Controllers Chapter 7
Changing the 1769-SDN Configuration
You can change (add or remove) the amount of data the controller has
assigned to the scanner module in the expansion module configuration dialog.
From within RSLogix 500 software, I/O configuration, open the 1769-SDN
scanner module and change the input or output words as needed. Save the
program and download to the controller.
Reducing the number of words for either inputs or outputs will require a
change in the 1769-SDN scanner module’s scanlist, which is done using
RSNetWorx for DeviceNet software.
IMPORTANT
We recommend that you not reduce the number of words
assigned to a 1769-SDN scanner module’s scanlist once a
system is operational. Changing the number of words may
cause addressing problems on the controller side, and mapping
changes on the DeviceNet network.
Adding words to an existing system is relatively easy to do,
because it doesn’t affect existing addresses or mapping. Add
the number of additional words that are needed in the module
(using the above example), and change the scanlist using
RSNetWorx for DeviceNet software.