Digi PortServer II, Руководство пользователя

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Page 162 Configuring Printer Connections 90030500B
General
Before you configure a printer that you have connected to PortServer II, check the
printer documentation and determine if the printer uses software flow control or hard-
ware flow control. If you set flow control incorrectly, the printer may not print all data
that is sent to it.
Note: Certain printers do not use flow control. If you have one of these printers, you
can ignore the
set flow
command described below.
Note: Parallel printers normally function correctly with PortServer II’s default flow
control settings.
Most printers that use hardware flow control issue the DTR (Data Terminal Ready)
signal when they are ready for data. If so, the DTR line from the printer must be wired
to an input to the PortServer II (usually CTS or DCD) that can be used for flow con-
trol. Some printers use Printer Busy (pin 11) for output flow control. Refer to Chapter
3, Installation and your printer documentation for more information.
Configuring a Printer Connection
1. Set the speed and parameters of the serial port that the printer is connected to, by
entering a command in the format:
set line baud=<baudrate> csize=<value> onlcr=<option>
otab=<option> parity=<option> range=<port_numbers>
stopb=<value>
•
baud
is the baud rate for the port.
•
csize
is the characters size, and may be
5
,
6
,
7
, or
8
characters.
•
onlcr
may be
on
to convert Line Feed characters to Carriage Return & Line
Feed characters, otherwise
off
.
•
otab
may be
on
to convert output tabs to eight spaces, otherwise
off
.
•
parity
may be
e
for even parity,
o
for odd parity, or
n
for no parity check-
ing.
•
range
identifies the port or ports you are configuring.
•
stopb
may be
1
or
2
to set the number of stop bits.
Note:
The default port settings for printing are 9600 baud, 8 data, 1 stop, and no
parity. If you are uncertain of your printer’s requirements, try these set-
tings first.