Allen-Bradley 1747-SN User Manual page 107

5–30 RIO Block Transfer
Rung 2:3
WHEN A BTR SUCCESSFULLY COMPLETES, BUFFER THE BTR DATA AND UNLATCH THE BTR
ENABLE BIT. ALSO, UNLATCH THE BTR PENDING BIT AND LATCH THE BIT THAT CONTINUES
CHECKING THE BTR STATUS UNTIL THE SN TURNS OFF THE DONE BIT.
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| VIRTUAL
| BTR DONE
| BIT
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|––––] [––––––––––––––––––––––––––––––––––––––––––––––+–+COPY FILE
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Rung 2:4
WHEN A BTR UNSUCCESSFULLY COMPLETES, BUFFER THE ERROR CODE AND UNLATCH THE BR
ENABLE BIT AND THE BTR PENDING BIT. ALSO, LATCH THE CHECK BTR STATUS BIT IN
ORDER TO CONTINUE READING THE STATUS INFORMATION FROM THE SCANNER UNTIL IT
TURNS THE ERROR BIT OFF, COMPLETING THE HAND–SHAKE PROCESS.
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| VIRTUAL
| BT ERROR
| BIT
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|––––] [––––––––––––––––––––––––––––––––––––––––––––––+–+MOVE
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Publication 1747 6.6 - July 1996
B3
13
B3
12
BTR DATA
+COP–––––––––––––––+
+–+–|
| |Source #M1:1.110| | |
| |Dest #N7:10| | |
| |Length 64| | |
| +––––––––––––––––––+ | |
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| BTR
| PENDING
| B3
+––––(U)–––––––––––––––+ |
| 80
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| VIRTUAL
| BTR ENABLE
| BIT
| B3
+––––(U)–––––––––––––––+ |
| 1615
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| CHECK BTR
| STATUS
| B3
+––––(L)–––––––––––––––+ |
81
BTR ERROR
CODE
+MOV–––––––––––––––+
+–+–|
| |Source M1:1.103| | |
| | *| | |
| |Dest N7:9| | |
| | 0| | |
| +––––––––––––––––––+ | |
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| BTR
| PENDING
| B3
+––––(U)–––––––––––––––+ |
| 80
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| VIRTUAL
| BTR ENABLE
| BIT
| B3
+––––(U)–––––––––––––––+ |
| 1615
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| CHECK BTR
| STATUS
| B3
+––––(L)–––––––––––––––+ |
81
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