Rs232 Demonstration Program - Metrologic MS2020 Stratos series Service Manual

TROUBLESHOOTING

RS232 DEMONSTRATION PROGRAM

If an RS232 scanner is not communicating with your IBM compatible PC, key in the following
BASIC program to test that the communication port and scanner are working. This program is
for demonstration purposes only. It is only intended to prove that cabling is correct, the com port
is working, and the scanner is working. If the bar code data displays on the screen while using
this program, it only demonstrates that the hardware interface and scanner are working. At this
point, investigate whether the application software and the scanner configuration match. If the
application does not support RS232 scanners, a software wedge program that will take RS232
data and place it into a keyboard buffer may be needed. This program tells the PC to ignore
RTS-CTS, Data Set Ready (DSR) and Data Carrier Detect (DCD) signals. If the demonstration
program works and yours still does not, jumper RTS to CTS and Data Terminal Reading (DTR)
to DCD and DSR on the back of your PC.
10 CLS
20 ON ERROR GOTO 100
30 OPEN "COM1:9600,S,7,1,CS0,DS0,CD0,LF" AS #1
35 PRINT "SCAN A FEW BAR CODES"
40 LINE INPUT #1, BARCODE$
50 PRINT BARCODE$
60 K$ = INKEY$: IF K$ = CHR$(27) THEN GOTO 32766
70 GOTO 40
100 PRINT "ERROR NO."; ERR; " PRESS ANY KEY TO TERMINATE."
110 K$ = INKEY$: IF K$ = "" THEN GOTO 110
32766 CLOSE: SYSTEM
32767 END
©2004 Metrologic Instruments, Inc. All rights reserved
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MS2020 Stratos Service Manual