Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 136)

Programming
Chapter 6
6–4
Figure 6.2
Sample BASIC Module Program
u5 DIM
A(10)
u10 REM SET BTW LENGTH TO 10 WORDS
u20 PUSH 10: CALL 4
u30 REM SET BTR LENGTH TO 2 WORDS
u40 PUSH 2: CALL 5
u50 REM READ THE BTW BUFFER
u60 CALL
6
u70 REM CONVERT DATA FROM 3-DIGIT SIGNED BCD TO DB FORMAT
u80 FOR I=1 TO 10 DO
u90 PUSH(I): CALL 10: POP A(I)
u100 NEXT I
u110 REM DO A CALCULATION
u120 T=A(1)+A(2)+A(3)+A(4)+A(5)+A(6)+A(7)+A(8)+A(9)+A(10):V=T/10
u130 REM CONVERT DATA FROM DB FORMAT TO 3-DIGIT SIGNED BCD
u140 PUSH T: PUSH 1: CALL 20
u150 PUSH V: PUSH 2: CALL 20
u160 REM WRITE TO THE BTR BUFFER
u170 CALL 7
u180 REM CONTINUE TO BLOCK TRANSFER
u190 GOTO 60
u200 END
Figure 6.3
Sample PLC-2 Family Ladder Diagram
6.3.1
PLC-2 Processor Program
(continued)