Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 124)

Publication 1747-UM010B-EN-P - September 2003
7-12 RIO Block Transfer
.
Control Status Bits
To use the BTR and BTW instructions correctly, examine the
instruction’s control and status bits stored in the control structure.
These bits are mapped to bits in word 0 of the control block structure.
Figure 7.1 Successful Block Transfer
Table 7.1 Control Block Structure
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word 0 EN ST DN ER EW TO RW Rack Group Slot
Word 1 Requested word count
Word 2 Transmitted word count/Error code
Control Information
Status Information
Control Bits
Status Bits
EN
TO
EW
ST
ER
DN
1 2 2 4 3 5