Measurement Computing Serial488A - Manual (Page 16)

2.6
Note that the Serial488A comes configured as an IEEE controller. In this mode
the Serial488A is designed to allow an RS-232 computer to communicate with an
IEEE peripheral such as a plotter. This controller mode is described in detail in
Section 3.
The Serial488A may also be configured as an IEEE peripheral. As an IEEE
peripheral, the Serial488A allows an IEEE controller to communicate with an RS-232
device. The peripheral mode of operation is described in detail in Section 4.
To modify any of these defaults, follow this simple procedure: Disconnect the
power supply from the AC line and from the interface. Disconnect any IEEE or serial
cables prior to disassembly.
WARNING
Never open the Serial488A case while it is
connected to the AC line. Failure to observe this
warning may result in equipment failure,
personal injury or death.
Place the interface upside down on a flat surface. Remove the four (4) screws
located near the rubber feet. Return the interface to the upright position and carefully
remove the top cover. Modify those parameters which are appropriate for your
installation and then carefully re-assemble the interface using the reverse of the
procedure described.
2.3 Serial Port Settings
The first parameters to configure are those that correspond to the RS-232 port.
These include baud rate, word length, number of stop bits, parity selection and type of
RS-232 handshake. Each of these are described in the following sections.
2.3.1 Serial Baud Rate Selection
Baud rate defines the number of serial bits per second transferred into
and out of the RS-232 interface. SW1-1 through SW1-4 determine the
serial baud rate. The factory default baud rate is 9600 baud. Baud rates
may be selected from 110 to 57600 baud (110 to 19200 for the
Serial488/512K).