Epson GQ-3500 User Manual
®
EPSON
Serial Interface
for the
GQ-3500
Printed in Japan
m
88.11-5
Y59099101000
Serial Interface
The serial interface is an option for your CQ-3500 printer.
pages tell you how to install and use the serial interface.
The GQ-3500 serial interface is actually two interfaces in one. It
can be used as either an RS-232C interface (the factory setting) or an
RS-422 interface, depending on the settings of the jumpers on the circuit
board.
These
Setting up the Serial Interface
When you receive your serial interface, it is configured as an
RS232C interface, 9600 baud, 8 data bits, no parity, 1 or 2 stop bits,
with the printer ready protocol enabled. This configuration will work
for many applications
To use this configuration with® PC computers, use the
following command at the DOS prompt
MODE COM1:9600,N,8,1,P
If you need to change the configuration of the serial interface
follow these steps:
1.
Refer to your computer and software docume
requirements are for a serial interface printer.
ntation to see what the
2. Select the RS-232C or RS-422 interface. The jumpers at Jl and J2
will have to be reconfigured for RS-422. Because RS232C is the
factory setting, the jumpers will not have to be reconfigured if you
choose this interface.
and on how to reconfigure the jumpers for the specific settings
described below, see the Serial Interface Jumpers section.
If you have changed the factory settings and want to reconfigure
the lumpers for RS232C operation, set the jumpers at Jl and J2 as
follows. At Jl, move REV, RD, and SRI to the left.
jumpers should be disconnected.
Serial Interface
For information on the location of Jl and J2
At J2, all
1 I
For RS422 operation, set the jumpers at Jl and J2 as follows.
move REV, RD, and SRI to the right. At J2, set all jumpers in the
installed position, except for TR+ and TR-.
Jumpers that were not given a especific setting above do not need to
be changed to select RS-232C or RS-422 operation (although they
may affect how the interface works).
3.
Select a baud rate by setting DIP switches 4-1, 4-2, and 4-3 as
indicated in Table 2.(For more information on setting DIP
switches, see the Serial Interface DIP Switches section of this
chapter.)
4.
Select 7 or 8 data bits by setting DIP switch 4-4 on for 8 bits per
character or off for 7 bits per character. Using 8 bits per character
is usually best.If you selected 7 data bits, select even, odd, or no
parity and set DIP switches 4-5 and 4-6 appropriately.
At Jl,
5.
Select a handshaking protocol.
software program, look in the manual to see if it requires a
particular protocol. If not, try the printer ready protocol. Set DIP
switches 5-l through 5-4 appropriately.
more than one protocol at the same time.
information, see the Communications Protocols section.
6.
Customize the interface if you need more control of the serial
interface.Study the functions shown in Table 3 that describe the
jumpers.For example,’ it’s possible to add DSR, CIS, and DCD
control to the interface.
Installing the Interface
Installing the serial interface is easy and doesn’t require any tools.
Just follow these steps:
1.
Make sum that the power to the printer is off.
2
Set the DIP switches on the interface card as described in
Appendix C.Use a ballpoint pen or similar object to set the
Switches
If you are using a commercial
Note that you can use
For additional
2
I
Serial Interface
3.4.Configure the jumpers on the serial interface card as described
above.
Remove the parallel interface from the back of the printer by
loosening the two Knobs and pulling its straight out as shown in
Figure 1. Store the parallel in the box that the serial
interface came in
Figure 1. Removing the interface
5. Slide the serial interface into the slot on the back of the printer
until it is flush with the printer case.
6.
Tighten two two knobs to secure the interface.
7.
Connect the serial cable from your computer to the interface.
Serial Inteface
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