Prescribe Frpo D0 Command; Rs-232C Cable Connection; Obtain A Suitable Rs-232C Cable; Connecting The Printer To The Computer - Kyocera FS-9120DN Operating Manual

H5: Protocol logic
Parameter value Meaning
0 Combination of 1 and 3 below
1 DTR/DSR, positive logic
2 DTR, negative logic
3 XON/XOFF
4 ETX/ACK
5 XON/XOFF recognized only as protocol
Table B-6
The factory default setting is 0.
H6: Buffer nearly-full threshold
This is a percentage from 0 to 99. The factory default setting
is 90.
H7: Buffer nearly-empty threshold
This is a percentage from 0 to 99. The factory setting is 70.
The factory default settings of the buffer nearly-full and near-
ly-empty thresholds (H6 and H7) are subject to change with-
out notification.
The gap between the nearly-full and nearly-empty thresholds
allows the computer to send a fairly large amount of data in
a continuous stream.
H8: Received-data buffer size
This is the size of the input buffer, specified in units of 10
Kbytes. The factory-set value is 6, meaning 60 Kbytes.

4.1 PRESCRIBE FRPO D0 command

The PRESCRIBE FRPO D0 command provides control over
XON/XOFF operation when an error occurs on the serial in-
terface. The following table summarizes the error status cor-
responding to different D0 values.
Timing of XON transfer to host
while Ready or Waiting
XON sent every 3 to 5 seconds
XON not sent
Table B-7
Serial interface error
Error Error
not resolved resolved
D0=0 D0=1
(default)
D0=10 D0=11
Appendix B Host Computer Interface

5. RS-232C Cable Connection

5.1 Obtain a Suitable RS-232C Cable

Make sure that the RS-232C cable is wired correctly. The ca-
ble 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 mo-
dem adapter.
1 Remove the plastic cover from the printer end of the
cable.
2 Next to each of the wires inside the cable is a bare
shield wire. Solder all these shield wires together
into a single bundle.
3 Using a section of flat wire about 3 mm wide and 15
mm long, connect the bundle of shield wires to the
metal facing of the connector. Check that the solder
connections are secure.
4 Desolder wires 2 and 3, then resolder them in
crossed configuration. Solder wire 2 to pin 3 and
wire 3 to pin 2. Cover the solder joints with ther-
mofit tube.
5 Cut wires 4, 5, 6, and 20.
6 Solder wires 5 and 6 together and connect them to
pin 20. Cover the solder joints with a thermofit tube.
Leave wire 4 unconnected.
7 Tape all remaining loose ends, or seal them with a
thermofit tube.
8 Attach the plastic cover back on.

5.2 Connecting the Printer to the Computer

Check that the power of both the printer and the computer is
switched off.
1 Discharge yourself of static electricity by touching a
metal object such as a doorknob.
2 Remove the plastie cap from the printer's RS-232C
interface connector.
3 Plug the printer end of the RS-232C interface cable
into the printer's RS-232C connector and screw it in
place.
4 Plug the other end of the cable into the computer's
RS-232C interface connector.
5 Switch on the printer's power.
B-4