Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 208)

11–8 Communicating with a PLC-5 Processor on a DeviceNet Network
Publication 2755-6.8
4. Double-click the 1771-SDN Scanner Module to open the
1771-SDN Module and Channel Configuration dialog.
5. Set the following PLC Interface Addresses. All other default
values can remain the same.
Input Output
BXfer 62 N23:0 N22:0
The PLC ladder logic uses these addresses in the Block Transfer
Read (N23:0) and Block Transfer Write (N22:0) instructions.
The SDN scanner maps data from the AdaptaScan Reader to its
62 word file. This selection maps data to the N23 file in the PLC.
The BTW instruction writes data from the N22 file to the 62 word
file in the SDN scanner.
If you are using an AdaptaScan with v7.0 (or lower) firmware on
a network with 2 or more nodes, change the Interscan Delay
parameter to 20 ms. This will allow the AdaptaScan more CPU
time to process bar code data instead of responding to DeviceNet
polls.
Note: Version 8.0 of the AdaptaScan Offline Programming
Software and firmware minimizes DeviceNet polling interruption
of scanning.