Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 151)

Publication 1756-UM534B-EN-P - November 2010 151
Adapter Mode I/O Map Appendix B
Block Transfer Write Structure
Block Transfer Write Structure on Monitored or Active Racks
Offset Bit Description
0 0…7 BTR update counter (increments each time BTR executes, 0…255)
8…10 BTR error code
11 BTR.ERR, block transfer read error
12…15 Reserved
1 0…7 BTW update counter (increments each time BTW executes, 0…255)
8…10 BTW error code
11 BTW.ERR, block transfer write error
12…15 Reserved
2…n 0…15 BTW data (64 integers, max)
Offset Word 0
BT Read
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Offset Words 2- n
BTW Data
BTW Data (64 integers, max)
Offset Word 1
BT Write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
BTR Error BTR Update Counter Block T
ransf
er
Read Err
o
r
BTW Update Counter BTW Error
Block T
ransf
er
W
rit
e Err
o
r
Reserved
Reserved
44844
Block transfer writes on active and monitored racks are
mapped to ControlLogix inputs.