Epson C82302-04 Owner's Manual
EPSON
32KB
Serial Interface
INTRODUCTION
The Serial Interface C82302* / C82304* is an interface
board that allows asynchronous serial data communication between a host computer and an Epson printer.
This board
a 32K byte buffer that frees up your computer for
other uses while your printer continues to print.
two self-test functions that can help solve interface
problems.
signal levels that can be set at either RS232C or 20
mA Current Loop.
handshaking protocol using X-on/X-off or DTR flag
control.
selectable data word structure. This
choose parity (Odd. Even, or None) and word bit
settings (either 7 or 8 bit).
selection of baud rate settings from 75 to 19,200 BPS.
(Data transmission speed is limited to 1,200 BPS
when the signal level is set to 20 mA Current Loop.)
This optional interface board is intended for use with the
following Epson printers:
FX, FX+, JX, LX, RX, RX+, HI-80 IX-800, EX-800/1000,
LQ-series (except for LQ-1500), SQ-series (except for SQ-
2000)
features:
allows you to
About this guide
This guide is designed to give you detailed information
on how to install your C82302* / C82304* serial interface
board
in a variety of Epson printers. Installation
procedures vary slightly depending upon the printer
model
that you have.
Also included, are instructions on how to adjust the
settings of the C82302*/C82304* interface board, as well
as a general description of serial data communication.
The C82302*/C82304* option package contains the
following items:
Optional connector loch nuts (2)
Note
When attaching the interface cable to the interface. you
nay find that the screws of your interface cable do not
it into the connector lock nuts. If this happens you will
need to replace the connector lock nuts with the optional
ones provided in this package.
2
SETTING THE CONDITIONS
The C82302*/C82304* interface board has two sets of
DIP (Dual In-line Package) switches, and 16 jumpers.
These switch& and jumpers are used for selecting
various interface operations.
Board layout
The figure below shows the layout of the C82302*/
C82304* board, and the locations of
and jumpers.
Figure 2. Board layout
the DIP switches
3
The c82302*/c82304* interface board has two sets of
DIP (Dual in-line Package) switches, and 16 jumpers.
These switches and jumpers are used for selecting
various interface operations.
Board layout
The figure below shows the layout of the (C82302*/
C82304* board, and the locations of the DIP switches
and jumpers.
Figure 1. Board layout
- - “7,
I
4
m1
4
~qJqhstalltheCgL302*/-~krfaa,you
nutyncedtoadjustsomeofthe=kings. Whennuking
DIp&t&Kttin
dtice,suchasa
CSUtiOll
chan~,itbbUttO~SpOinted
-point pen
fall
oramalllsawdljver.
All changes of DIP switch and jumper settings show are
made with the printer power turned off.
chacks and
recognizes new settings only at the time the
the printer
power is turned on
About DIP
switches
The two sets of DIP switches on the C82302*/C82304*
are labelled SW1and SW2. Each set contains a number
of individual toggIe type switches that can be set either
onoroff.
(SW1 or SW2) and number.
The individual switches are referred to by set
Therefore, the switch in set
SW1 marked by the small number 3 is calIed DIP switch
1-3
5
DIP switch 1(Interface operations)
The table below contains information on switch func-
tions, and the factory setting
of each
switch.
The
switches on DIP switch 1 allow you to change interface
functions.
Table
1- DIP
-------
L
s
l-1
l-2
l-3 Evcn/ald puity-
I4 potalityae~
lb
--
14
1-7
la
smitch 1
--.
ON OFF
WUdhI@h-
Parity check
Irksam
FLgtUIlUpaitivdnqative Negative
auble/diubk
Baudntelektion
7bth
Enable
Even Odd
@JoteZ) OJaal)
See Table 3.
(bib
OFF
I)iyMc
OFF
Paith’f!
1
‘z
OFF
m
OFF
OFF
OFF
OFF
Note
1. Positive:
Data Entry Enabled DTR ON (+3V to +27v)
Data Entry Disabled DTR OFF (-3V to -27V)
2 Negative:
Data Entry Enabled DTR OFF (-3V to -27W
Data Entry Disabled DTR ON (+3V to +27v)
6
Data word structure
The data word structure is also operator selectable
through DIP switch settings (see Table 1). The word
structure for serial data is:
1 start bit + 7 or 8 data bits (selectable) + 1 Even or
Odd parity bit (optional) + 1 or more stop bits
The table below shows the possible word
Combinations.
structure
Baud rate selection
In serial data communication, data is transmitted in the
form of bits. These data bits go out one at a time along a
(Bits
single path, and in a specified order. The BPS
Per
Second) rate, or speed at which these bits are transmit-
ted, can be selected using a combination of DIP switch
settings.
Note
In the current loop mode, normal data transfer operation
cannot be guaranteed at a baud rate setting exceeding
1,200 bps
7
Loading...