Owner`s manual

21
If the computer is communicating 7 bit word size with parity enabled,
the 8th or parity bit is masked from the Port Select Code before it is
examined, allowing you to send the Port Select Code with odd or even
parity.
Section 6.2 discusses how to use the Port Select Code to select
peripheral ports and Section 6.3 describes computer port selection.
Factory default is $SELECT.
" 
In multiple peripheral applications, you can choose between two
methods of selecting peripherals. Mode A is a general-purpose mode
and allows the computer to select a peripheral anytime while printing by
sending a new Port Select Code. Mode B allows the computer to
select the printer at the beginning of printing only. The unit is
transparent after 16 characters or more. Computer-to-computer
communication is not affected by the Port Select Mode.
Factory default is Mode A: printer selection anytime while printing.
" 
The Model 24 will translate for serial devices using different
configurations. You may set the baud rate, word size, stop bits, parity
and XON/XOFF (transmit and receive) for each individual serial port.
The available values for these parameters are listed in Section 2
(Specifications).
Factory-default configuration on all serial ports is 9600 baud rate,
8 bit word size, 1 stop bit, no parity, and XON/XOFF disabled.