Metrologic Instruments MS9500 Series RS232,

RS232

If an RS232 scanner is not communicating with an 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, the hardware

interface and scanner are working. The next step would be to investigate

whether the application software and the scanner configuration match.

If the application does not support RS232 scanners, a software wedge program

is available that will take RS232 data and place it into a keyboard buffer. This

program tells the PC to ignore RTS-CTS, Data Set Ready (DSR) and Data

Carrier Detect (DCD) signals. If the demonstration program works but the

customer's application software 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,CSO,DSO,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 KK$ = INKEY$: IF K$ = “”THEN GOTO 110

32766 CLOSE: SYSTEM

32767 END