User manual

ARC250 User Manual 1.10 - 56
8.3 Troubleshooting communication problems
In case of communication problems you can use the information in this section
to troubleshoot communication problems.
8.3.1 Set/Check scanner communication settings:
Switch on the scanner, select MENU _ 3 _ 5. The display shows the current
communication settings. The speed must be set to 4800, 9600 or 19200. Press
the enter button to store the selection. We advise 19200 baudrate for best
performance (57600 for 296/796 models). The scanner does not indicate
whether it is in remote mode or not.
In the picture below the serial communication is disabled:
8.3.2 Check your cable
Most problems are traced back to serial cable problems. For the BC785D you
need a so called straight RS232 cable, not a null modem cable! See below for
wiring details.
BC250/296:
The BC250 comes with a special serial cable. Connect the cable directly to your
PC serial port (9 pin male connector). If you use extra cables remove them and
connect your scanner directly to your PC.
BC785/796:
If you used the required serial cable before for serial devices, it is unlikely
there is a problem with your cable.
If you did not use the serial cable before, there may be a problem with your
serial cable because there are different types of serial cables available and not
all cables work with the BC785!
The serial cable used for the BC785 must be a straight thru cable, use a
multimeter to check and verify the wiring of your cable:
9 pin sub D female (PC) 9 pin sub D male (scanner) Signal Name
Pin 1 Pin 1 Data Carrier Detect
Pin 2 Pin 2 Received Data
Pin 3 Pin 3 Transmitted Data
Pin 4 Pin 4 DTE (Data Terminal) Ready
Pin 5 Pin 5 Signal Ground
Pin 6 Pin 6 DCE (Data Set) Ready
Pin 7 Pin 7 Request to Send
Pin 8 Pin 8 Clear to Send
Pin 9 Pin 9 Ring Indicator