Epson Serial Interface GQ-3500 - Manual (Page 2)

Serial Interface
The serial interface is an option for your CQ-3500 printer. These
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.
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 documentation to see what the
requirements are for a serial interface printer.
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. For information on the location of Jl and J2
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. At J2, all
jumpers should be disconnected.
Serial Interface
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