Allen-Bradley 1747-SN User Manual page 128

Rung 2:5
WHEN A BTR SUCCESSFULLY COMPLETES
BTR VIRTUAL ENABLE BIT AND THE BTR PENDING BIT
CONTINUES CHECKING THE BTR STATUS UNTIL THE SN MODULE TURNS OFF THE DONE BIT.
|
|
| VIRTUAL
| BTR DONE
| BIT
| N7:60
|––––] [––––––––––––––––––––––––––––––––––––––––––––––+–+COPY FILE
| 13
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Rung 2:6
WHEN A BTR UNSUCCESSFULLY COMPLETES, BUFFER THE ERROR CODE AND UNLATCH THE BTR
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.
|
|
| BTR ERROR
| BIT
| N7:60
|––––] [––––––––––––––––––––––––––––––––––––––––––––––+–+MOVE
| 12
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
BUFFER THE BTR DATA AND UNLATCH BOTH THE
,
ALSO LATCH THE BIT THAT
. ,
| |Source
| |Dest
| |Length
| +––––––––––––––––––+ | |
|
|
|
| BTR
| PENDING
|
+––––(U)–––––––––––––––+ |
|
|
|
| VIRTUAL
| BTR ENABLE
| BIT
|
+––––(U)–––––––––––––––+ |
|
|
|
|
|
|
|
| CHECK BTR
| STATUS
|
+––––(L)–––––––––––––––+ |
| |Source
| |
| |Dest
| |
| +––––––––––––––––––+ | |
|
|
|
| BTR
| PENDING
|
+––––(U)–––––––––––––––+ |
|
|
|
| VIRTUAL
| BTR ENABLE
| BIT
|
+––––(U)–––––––––––––––+ |
|
|
|
|
| CHECK BTR
| STATUS
|
+––––(L)–––––––––––––––+ |
RIO Block Transfer
BTR DATA
+COP–––––––––––––––+
+–+–|
#M1:1.110| | |
#N7:0| | |
10| | |
| |
| |
| |
| |
| |
B3 | |
0 | |
| |
| |
| |
| |
| |
N7:50 | |
15 | |
| |
| |
| |
| |
| |
| |
| |
| |
B3 | |
2
+MOV–––––––––––––––+
+–+–|
M1:1.103| | |
*| | |
N7:21| | |
0| | |
| |
| |
| |
| |
| |
B3 | |
0 | |
| |
| |
| |
| |
| |
N7:50 | |
15 | |
| |
| |
| |
| |
| |
B3 | |
2
Publication 1747 6.6 - July 1996
5–51
|
|
|
|
|
|
|
|
|
|
|
|
|