© National Instruments Corp.
A-1 GPIB-232CT-A for MS-DOS/Windows
Appendix A
Hardware Configuration
This appendix describes how to configure the GPIB-232CT-A RS-232 serial
port.
The default hardware settings for the GPIB-232CT-A are compatible with
the default software settings. If you change the hardware settings, make
sure that you also change the software settings so that they are compatible.
Configure the RS-232 Serial Port
The GPIB-232CT-A is shipped from the factory configured to operate in
Serial (S) mode. In S mode, the computer attached to the RS-232 port of the
GPIB-232CT-A is the controlling device. The RS-232 serial port is
configured at 9600 baud, 1 stop bit, no parity, and 8 data bits. To change the
parameters, you set the configuration switches on the back panel.
The DIP switch is used to configure the serial port parameters of the
GPIB -232CT-A while in S mode. In G mode, the GPIB-232CT-A is used to
interface an RS-232 device as a GPIB Talker/Listener.
Figure A-1 shows the factory default setting of the DIP switch. In
Figure A -1, the black side of the switch represents the position of the switch
handle.
S MODE
DATA FORMAT
BAUD RATE
OFF
GPIB ADDRESS
G MODE
ON
Figure A-1. Factory Default Setting (S Mode) for DIP Switch