Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual - Manual (Page 121)

Block Transfer Write and Block Transfer Read Configurations for 2 Output/6 Input 1771-N Series Modules E–9
Publication 1771ĆUM127B-EN-P - December 2002
Definition
Decimal Bit
(Octal Bit)
Word
Words 16 and 17 Same as words 8 and 9 but for channel 7.
Words 18 and 19 Same as words 8 and 9 but for channel 8.
Words 20 thru 27 For factory use only