Rockwell Automation 1769-SDN Compact I/O DeviceNet Scanner Module User Manual - Manual (Page 48)

48 Publication 1769-UM009E-EN-P - August 2009
Chapter 4 Automatically Configure a DeviceNet Network
Configure I/O Allocation Size Via the User Program
Use the parameters shown in the MSG message setup screen below to adjust
the I/O allocation size. Make sure that the message is sent to the appropriate
DeviceNet Scanner.
3. Execute an Explicit message to the scanner using the SetAttributeSingle
service to enable AutoScan. There are multiple ways to send an explicit
message on DeviceNet, including the following:
• Initiate AutoScan Via the User Program
• Initiate AutoScan via the 193-DNCT Terminal
This data tag should
be configured as an
SINT, and should
contain the value of
the desired
per-node fixed
mapping size (1 - 32)
IMPORTANT
You can only change the I/O allocation size when:
• the scanner is in IDLE mode, and
• the AutoScan feature is disabled.