Appendix C Host Computer Interface
C-5
Obtaining a Suitable RS-232C Cable
Make sure that the RS-232C cable is wired correctly. The cable
must be a null modem cable; that is, one in which pin 2 on
either end of the cable is connected to pin 3 on the other end.
You cannot use a straight cable such as IBM communication
adapter cable type 1502067 unless you purchase a null modem
adapter.
Connecting the Printer to the Computer
Check that the power of both the printer and the computer is
switched off.
Discharge yourself of static electricity by touching a
metal object such as a door knob.
Remove the plastic cap from the printer’s RS-232C
interface connector.
Plug the printer end of the RS-232C interface cable
into the printer’s RS-232C connector and screw it in
place.
Plug the other end of the cable into the computer’s
RS-232C interface connector.
Switch on the printer’s power.
The printer’s RS-232C parameters are factory-set to
the following values:
Baud rate=9600 bps, data bits (character length)=8
bits, stop bits=1, parity=none
The two RS-232C protocols are XON/XOFF and
DTR. The printer performs both of them
simultaneously, using positive logic for DTR.
If you are uncertain as to the printer’s current
parameter settings, you can reset them to the values
listed above. See
Set the computer to the same parameters as the
printer. On many computers this can be done by set-
ting DIP switches before the power is turned on. An-
other method is as follows:
With Windows 95/98/Me, make settings as follows:
Click on the
Start
button in the Windows 95/98/Me
Task Bar and align the cursor with
Settings
, then
click on
Control Panel
from among the items dis-
played.
The control panel folder opens. Double click on
Sys-
tem
.
System Properties
opens. Click on the
Device Man-
ager
tab, then click on the
COM
port to be used.
Click on the
Properties
button.
The Properties sheet is displayed for the selected
COM
port. Click on the
Port Settings
tab and set the
port properties.
After setting the properties, click the
OK
button.
RS-232C Cable Connection
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