Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 114)

Publication 1747-UM010B-EN-P - September 2003
7-2 RIO Block Transfer
RIO Block Transfer Theory of Operation - Path of a Block Transfer
Block Transfer Write (BTW) data travels from the SLC processor across
the chassis backplane via the scanner’s M files. The scanner then
sends the data across the RIO link to the adapter of intelligent I/O
module.
Block Transfer Read (BTR) data travels from the adapter of intelligent
I/O module over the RIO link to the scanner. The chassis backplane
then transfers BTR data via the scanner’s M files to the SLC processor.
The SLC control program processes the data once the SLC receives it
from the scanner.
Adapter or
Intelligent I/O
Module
RIO Link
M Files
Chassis Backplane
M Files
RIO
Scanner
I/O
Image
SLC 5/02
(or above)
Processor
_ _ _ = path of a Block Transfer (BT)