Chapter 3
Installing and Configuring Your Controller
©
National Instruments Corporation
3-5
Sample Switch Settings for S Mode
To operate in S mode, set switch 8 to OFF. Set the remaining switches to
match the characteristics of the terminal or computer you attach to the other
end of the serial cable.
Often, you can change the serial port characteristics of the terminal or
computer by setting switches or running a utility program, or from within
a programming environment. Determine the default characteristics of your
computer or terminal’s serial port. If you want to change the configuration
on that side, do so before attempting to communicate with the
GPIB-232/485CT-A. Then set the configuration switch on the
GPIB-232/485CT-A to match your serial port characteristics.
IBM PC or Compatibles
If your computer is an IBM PC or compatible, the serial port default
characteristics on the PC are as follows:
Baud rate
1200
Parity
Even
Data bits
7
Stop bits
1
Table 3-3.
S Mode Switch Settings for Data Formatting Characteristics
Switch
Position
Indication
4
OFF
odd parity
ON
even parity
5
OFF
parity generation/checking disabled
ON
parity generation/checking enabled
6
OFF
1 stop bit/character
ON
2 stop bits/character
7
OFF
7 bits/character
ON
8 bits/character
8
OFF
operates in S mode
ON
operates in G mode
