Rockwell Automation 1747-SN Remote I/O Scanner - Manual (Page 148)

Publication 1747-UM013B-EN-P - January 2005
D-20 Block Transfer Examples for Earlier Processors
Rung 2:9
THIS RUNG WILL EXECUTE BLOCK TRANSFER READS CONTINUOUSLY, AS FAST AS POSSIBLE.
| | | |
| | | |
| VIRTUAL |VIRTUAL |VIRTUAL |
| BTR ENABLE|BTR DONE |BTR ERROR BTR |
| BIT |BIT |BIT PENDING |
| N7:50 N7:60 N7:60 B3 |
|----]/[--------]/[--------]/[----------------------------------+----(L)-----+-|
| 15 13 12 | 0 | |
| | | |
| | | |
| | VIRTUAL | |
| | BTR ENABLE | |
| | BIT | |
| | N7:50 | |
| +----(L)-----+ |
| 15 |
Rung 2:10
THIS RUNG WILL EXECUTE BLOCK TRANSFER WRITES CONTINUOUSLY, AS FAST AS POSSIBLE.
| | | |
| | | |
| VIRTUAL |VIRTUAL |VIRTUAL |
| BTW ENABLE|BTW DONE |BTW ERROR |
| BIT |BIT |BIT BTW DATA |
| N7:53 N7:64 N7:64 +COP---------------+ |
|----]/[--------]/[--------]/[------------------------+-+COPY FILE +-+-|
| 15 13 12 | |Source #N7:10| | |
| | |Dest #M0:1.210| | |
| | |Length 11| | |
| | +------------------+ | |
| | | |
| | | |
|
| | |
| | | |
| | | |
| | VIRTUAL | |
| | BTW ENABLE | |
| | BIT | |
| | N7:53 | |
| +----(L)---------------+ |
| | 15 | |
| | | |
| | | |
| | | |
| | BTW | |
| | PENDING | |
| | B3 | |
| +----(L)---------------+ |
| 1 |
Rung 2:11
MOVE THE VIRTUAL BTR CONTROL WORD TO THE M0 FILE FOR THE SN MODULE WHILE A BTR
IS IN PROGRESS, AND CONTINUE DOING SO UNTIL THE ENABLE, DONE AND ERROR BITS
ARE ALL TURNED OFF, COMPLETING THE HAND-SHAKE PROCESS.
| |
| |
| VIRTUAL BTR |
| BTR ENABLE CONTROL |
| BIT BITS |
| N7:50 +MOV---------------+ |
|-+----] [-----+------------------------------------------+MOVE +-|
| | 15 | |Source N7:50| |
| | | | 0| |
| | | |Dest M0:1.100| |
| | | | *| |
| | | +------------------+ |
| | | |
| | | |
| | VIRTUAL | |
| | BTR DONE | |
| | BIT | |
| | N7:60 | |
| +----] [-----+ |
| | 13 | |
| | | |
| | | |
| | VIRTUAL | |
| | BTR ERROR | |
| | BIT | |
| | N7:60 | |
| +----] [-----+ |
| 12 |