Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 136)

136 Publication 1756-UM534B-EN-P - November 2010
Appendix A Scanner Mode I/O Map
Block Transfer Output
BT Write Structure-Output
Offset 0 bits 0…5 contain the block transfer read length.
Offset 0 bit 8 contains the block transfer read enable bit for manual mode
block transfers.
Offset 0 bit 9 is used in two ways:
• In manual mode, this bit is the block-transfer-read-continuous bit. If
this bit is set and the enable bit is set, the 1756-RIO module re-enables
block transfer reads when they execute successfully.
• In automatic and semi-automatic modes, this bit inhibits all block
transfers to the I/O module.
Offset 1 bits 0…5 contain the block transfer write length.
Offset 1 bit 8 contains the block transfer write enable bit for manual mode
block transfers.
Offset 1 bit 9 is the block-transfer-write-continuous bit. If this bit is set and
the enable bit is set, the 1756-RIO module re-enables block transfer writes
when they execute successfully.
Word offsets 2…n contain the write data sent to the block transfer write
module.
0 1 2 3 4 5 6 7 8 9
BTR Write Data Container for BTW Module
1st
16-bit
Word
BTW
44822