Rockwell Automation 57C570 AutoMax PC3000 User Manual - Manual (Page 160)

14Ć2
During a blockĆtransfer read request, the number of words specified
in the request's Length of the BlockĆTransfer register is read from the
blockĆtransfer module and placed in the corresponding words in the
data table register.
Adapter
B
T BT #
Data
Table
Data
Table PC3000 Scanner
Remote I/O Rack
➀
➁ n words transferred
Block transfer request
Read n words
Figure 14.1 Ć BlockĆTransfer Read Operation
During a blockĆtransfer write, the number of words specified in the
request's Length of the Block Transfer register is copied from the
appropriate data table registers and written to the blockĆtransfer
module.
Adapter
B
T
BT #
Data
Table
Data
Table
PC3000 Scanner
Remote I/O Rack
n words transferred
➀
➁
Block transfer request
Write n words
Figure 14.2 Ć BlockĆTransfer Write Operation