Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 223)

Chapter
Call Routines 0–68 12
12 -33
Syntax
PUSH destination port number and/or internal string
PUSH 0
PUSH 1
PUSH string number
PUSH byte swap selection
CALL 34
POP CALL 34 status
Example
>01 PUSH 64 : CALL 4 : REM SET BLOCK TRANSFER WRITE
LENGTH
>10 REM ENABLE CALL 34 INTERRUPTS
>20 PUSH 2 : REM SEND DATA TO PRT1
>30 PUSH 0 : REM ALWAYS 0
>40 PUSH 1 : REM ALWAYS 1
>50 PUSH 0 : REM STRING NUMBER/NOT USED HERE
>60 PUSH 1 : REM ENABLE BYTE SWAPPING
>70 CALL 34
>80 POP S : REM STATUS OF CALL SETUP
>90 IF (S<>0) THEN PRINT “UNSUCCESSFUL CALL 34 SETUP”
Sample Ladder Logic
(L)
O:001
11
BTW
BLOCK TRANSFER WRITE
Rack
Group
Module
00
1
0
N7:0
N10:10
64
Control Block
Data file
Length
Rung 2:0
11 PRT1
I:001
Rung 2:2
[END OF FILE]
(EN)
(DN)
(ER)
N Continuous
N10:0
0
Rung enable bit
(N10:0 used as example)
(U)
N10:0 This bit is O:001/13
if using PRT2
Rung 2:1
(U)
O:001
11 (or 13)
0
O:001
(or 13 PRT2)
11 PRT1
(or 13 PRT2)