Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 227)

Chapter
Call Routines 0–68 12
12 -37
Description Status code
17 no DATA available for READ
18 DF1 cannot be enabled (JW4 in wrong position)
19 •
illegal use of PRT2 while DF1 is enabled
•
illegal use of PRT2 while background DF1 task is enabled
•
attempted to transmit DF1 packet before DF1 is enabled
•
attempted to transmit DF1 packet of incorrect length
20 arithmetic overflow (value too large for range)
21 bad line number
22 JW5 in 8-point position
30 arithmetic underflow (value too small for range)
40 bad argument
Syntax
PUSH 0 or 1
CALL 38
Example
>10 ONERR 160
>20 PUSH 1
>30 CALL 38
>40 PUSH 1000:REM PUSH NUMBER FOR CALL 20 CONVERSION +/–999
>50 PUSH 3:REM WORD 3 IN BTR BUFFER
>60 CALL 20:REM CONVERT TO 3-DIGIT SIGNED BCD
>70 X=100
>80 Y=0
>90 Z=X/Y
>100 END
>160 REM EXPANDED ONERR ROUTINE
>170 PRINT “ERROR CODE WAS”,XBY(257)
>180 PRINT “AT LINE ”,(256*XBY(69FDH)+XBY(69FEH))
>END