Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 128)

Operating Functions
Chapter 5
5–91
Example:
For using protected variable storage area.
A. Scalar Variables
Push all variables in one line:
uPRINT MTOP
14335
uPRINT MTOP-24
14311
uPUSH 14311:REM NEW MTOP ADDRESS
CALL 77
90 M1=14335 : REM BEGIN STORING HERE
100 PUSH A, B, C, D
Use the ST @ and LD @ commands in a DO loop:
u200 DO
u210 ST @ M1
u220 M1=M1-6 : REM EACH VARIABLE =6 BYTES
u230 UNTIL M1=MTOP: REM YOU DEFINED THE NEW MTOP W/CALL 77
u290 M1=14335
u300 DO
u310 LD @ M1
u320 M1 = M1-6
u330 UNTIL M1 = MTOP
u360 POP A, B, C, D
u370 PRINT A, B, C, D
5.11.6
Protected Variable
Storage – CALL 77
(continued)