Allen-Bradley 1747-SN User Manual page 114

Rung 2:5
INITIATE A BTR FOR EACH FALSE–TO–TRUE TRANSITION OF THE USER INPUT.
| USER LOGIC
| TO
| INITIATE A
| BTR
| I:2 B3
|––––] [––––––[OSR]–––––––––––––––––––––––––––––––––––––––––––––––––––––––(L)––|
| 0 82
Rung 2:6
WHEN USER LOGIC INITIATES A NEW BTR, LATCH THE ENABLE BIT AS LONG AS A BTR IS
NOT IN PROGRESS. ALSO, LATCH THE BTR PENDING BIT SO THE BTR STATUS FILE WILL BE
READ BY THE LADDER PROGRAM.
| |
| |
| VIRTUAL |VIRTUAL
| BTR ENABLE|BTR DONE
| BIT |BIT
| B3 B3
|––] [–––––]/[––––––––]/[––––––––]/[––––––––––––––––––––––––––––+––––(L)–––––+–|
| 83 1615
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Rung 2:7
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 BTR HAND–SHAKE PROCESS.
|
|
| VIRTUAL
| BTR ENABLE
| BIT
| B3
|–+––––] [–––––+––––––––––––––––––––––––––––––––––––––––––+MOVE
| | 1615 |
| | |
| | |
| | |
| | |
| | |
| | |
| | VIRTUAL |
| | BTR DONE |
| | BIT |
| | B3 |
| +––––] [–––––+
| | 13 |
| | |
| | |
| | VIRTUAL |
| | BTR ERROR |
| | BIT |
| | B3 |
| +––––] [–––––+
| 12
Rung 2:8
|
|–––––––––––––––––––––––––––––––––––––+END+––––––––––––––––––––––––––––––––––––|
|
|
|
|VIRTUAL
|BTR ERROR
|BIT
B3 B3
13 12
RIO Block Transfer
B3
83 |
BTR
PENDING
B3
| 80 | |
| | |
| | |
| VIRTUAL | |
| BTR ENABLE | |
| BIT | |
| B3 | |
+––––(L)–––––+ |
| 1615 | |
| B3 | |
+––(U)–––––––+ |
83
BTR
CONTROL
WORD
+MOV–––––––––––––––+ |
+–|
|Source B3:100| |
| 0000000000000000| |
|Dest M0:1.100| |
| *| |
+––––––––––––––––––+ |
Publication 1747 6.6 - July 1996
5–37
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