Rockwell-automation 1771-DB BASIC MODULE Manual do Utilizador Página 227

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Chapter
Call Routines 0–68
12
12 -37
DescriptionStatus 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
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