Rockwell Automation 1769-ASCII Compact I/O ASCII Module - Manual (Page 61)

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 61
Configure the 1769-ASCII Module Chapter 2
10. ASCII protocol configuration can be done under Configuration tab.
Channels 0 and 1 can have different configuration.
Advanced ASCII protocol configuration like Byte Swap Mode can be
done under Advanced Configuration tab. Channels 0 and 1 can have
different advanced configurations.