Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 135)

Publication 1756-UM534B-EN-P - November 2010 135
Scanner Mode I/O Map Appendix A
Block Transfer Control Read Structure
BT Read Structure Table
Offset (Words) Bit Description
0 (BT Read) 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 BTR.DN, block transfer read done (manual mode only)
13…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 BTW.DN, block transfer write done (manual mode only)
13…15 Reserved
2…n 0…15 BTR data (64 integers, max)
BT Read
Offset Word 0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Returned Read Data
Offset Words 2… n
Read Data Returned by the Block Transfer
BT Write
Offset Word 1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Reserved
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
Read Done M
anual M
ode Only
BTW Update Counter BTW Error
Block T
ransf
er
W
rit
e Err
o
r
W
rit
e Done
M
anual M
ode Only
Reserved
44815