Rockwell Automation 1747-SN Remote I/O Scanner - Manual (Page 134)

Publication 1747-UM013B-EN-P - January 2005
D-6 Block Transfer Examples for Earlier Processors
Directional Continuous Block Transfer Example
The following rungs demonstrate a directional continuous block
transfer. As long as the BTR precondition bit is true, block transfer
reads execute continuously. Use the same method for a BTW.
Rung 2:6
MOVE THE VIRTUAL CONTROL WORD TO THE M0 FILE FOR THE SN MODULE WHENEVER A
TRANSITION OF THE BTW ENABLE BIT OCCURS.
| |
| |
| VIRTUAL |
| BTW ENABLE |
| BIT |
| B3:100 +MOV---------------+ |
|-+----] [-----+------------------------------------------+MOVE +-|
| | 15 | |Source B3:100| |
| | | | 0000000000000000| |
| | | |Dest M0:1.100| |
| | | | *| |
| | | +------------------+ |
| | | |
| | | |
| | VIRTUAL | |
| | BTW DONE | |
| | BIT | |
| | B3:0 | |
| +----] [-----+ |
| | 13 | |
| | | |
| | | |
| | VIRTUAL | |
| | BTW ERROR | |
| | BIT | |
| | B3:0 | |
| +----] [-----+ |
| 12 |
Rung 2:7
| |
|-------------------------------------+END+------------------------------------|
| |