Allen-Bradley 1747-SN User Manual page 108

Rung 2:5
BLOCK TRANSFER READS WILL EXECUTE CONTINUOUSLY AS LONG AS THE BTR PRECONDITION
BIT IS TRUE.
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| BTR PRE– |VIRTUAL
| CONDITION |BTR ENABLE|BTR DONE
| BIT |BIT
| B3 B3
|––––] [––––––––]/[––––––––]/[––––––––]/[–––––––––––––––––––––––+––––(L)–––––+–|
| 83 1615
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Rung 2:6
MOVE THE VIRTUAL 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.
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| VIRTUAL
| BTR ENABLE
| BIT
| B3
|–+––––] [–––––+––––––––––––––––––––––––––––––––––––––––––+MOVE
| | 1615 |
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| | VIRTUAL |
| | BTR DONE |
| | BIT |
| | B3 |
| +––––] [–––––+
| | 13 |
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| | VIRTUAL |
| | BT ERROR |
| | BIT |
| | B3 |
| +––––] [–––––+
| 12
Rung 2:7
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|–––––––––––––––––––––––––––––––––––––+END+––––––––––––––––––––––––––––––––––––|
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|VIRTUAL |VIRTUAL
|BT ERROR
|BIT |BIT
B3 B3
13 12
RIO Block Transfer
BTR
PENDING
B3
| 80 | |
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| VIRTUAL | |
| BTR ENABLE | |
| BIT | |
| B3 | |
+––––(L)–––––+ |
1615
BTR
CONTROL
WORD
+MOV–––––––––––––––+ |
+–|
|Source B3:100| |
| 0000000000000000| |
|Dest M0:1.100| |
| *| |
+––––––––––––––––––+ |
Publication 1747 6.6 - July 1996
5–31
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