Allen-Bradley 1747-SN User Manual page 151

7–18 Application Examples
Rung 2:3
When a BTR successfully completes, buffer the block transfer data and unlatch both
the BTR enable bit and the BTR pending bit. The data in this example is from
analog input 0 located at remote address: Logical Rack 3, Group 7, left slot (0).
This analog input is 4–20mA input from a transducer.
|
|
| VIRTUAL
| BTR DONE
| BIT
|
|––––] [––––––––––––––––––––––––––––––––––––––––––––––+–+COPY FILE
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Rung 2:4
When a BTW successfully completes, unlatch the BTW enable bit and the BTW pending
bit to complete a BTW sequence.
|
|
| VIRTUAL
| BTW DONE
| BIT
|
|––––] [––––––––––––––––––––––––––––––––––––––––––––––––––––––––+––––(U)–––––+–|
|
|
|
|
|
|
|
|
|
Publication 1747 6.6 - July 1996
N7:60
13
N7:64
13
BTR DATA
+COP–––––––––––––––+
+–+–|
| |Source #M1:1.110| | |
| |Dest #N7:10| | |
| |Length 2| | |
| +––––––––––––––––––+ | |
| SERVICE
| THE BTR
| STATUS/
| BTR
| PENDING
| B3:0
+––––(U)–––––––––––––––+ |
| 0
|
|
|
| BTR ENABLE
| BIT
| M0:1.100
+––––(U)–––––––––––––––+ |
| 15
|
|
|
| GOOD BTR
| DATA BIT
| B3:0
+––––(L)–––––––––––––––+ |
2
SERVICE
THE BTW
STATUS/
BTW
PENDING
B3:0
| 1
|
|
|
| BTW ENABLE | |
| BIT
| M0:1.200 | |
+––––(U)–––––+ |
15
|
|
|
|
|
|
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
|
|
|
|
|
|
|
| |
| |
| |
| |
| |
|