Serial Interface; Serial Interface Specifications - Kyocera Mita FS-6750 Service Manual

A.2

Serial interface

The printer is equipped with a serial port whose circuitry duplicates the interface
card IB-10E. The serial interface is provided only for Korea as standard, not pro-
vided for Taiwan. The device responsible for controlling the serial interface is inte-
grated in the gate array in the controller system. The serial interface supports both
protocols of RS-232C and RS-422A.
In the RS-232C protocol, CTS and DSR signals are included to support SNMP
(Simple Network Management Protocol) protocol (used typically for Windows 95's
plug-and-play function). Toggling the protocol between RS-232C and RS-422A is
made by a shorting jumper socket that is accessible on the controller board. (The
jumper wire arrangement, that used to be provided for the succeeding models to
switch the DTR polarity is not used with these models.) To change the serial inter-
face protocol, refer to Changing the serial interface configuration section which fol-
lows.
A 25-pin D-sub connector is used for the serial interface. The extra signals used for
RS-422A are assigned to these pins that are not used for RS-232C according to the
IBM pin assignment scheme.

Serial interface specifications

The table below summarizes the specifications for the serial interface used in the
printer. The parameter options can be selected using either the printer's front
panel or Prescribe FRPO command.
Table A. 3 Serial interface specifications
Item
Interface mode
Baud rate
Data bit length
Parity bit length
††
Protocol
Error robust con-
†††
trol
Status send
†. The serial interface mode currently engaged is indicated at the bottom of the service status page
as: RS2=RS-232C mode, RS4=RS-422C mode.
Option parameters
RS-232C or RS-422C By changing hard-
†
300, 600, 1200, 2400,
4800, 9600, 19200,
38400, 57600, 115200
7, 8
None (0), odd (1),
even (2), ignore (3)
DTR [pos] & Xflow
[buf] (0), DTR [pos]
(1), DTR [neg] (2),
Xflow [buf] (3), ETX
[nobuf] (4), Xflow
[nobuf] (5), ETX [buf]
(6), Xflow [buf] &
ETX [nobuf] (7)
Robust On (0),
Robust Off (1), Error
Control & Robust Off
(10), Error Control &
Robust On (11)
^C, ^T, Esc.B, Esc.
A-4
Selection
ware jumper (See the
next section)
Front panel or FRPO
H1 command
Front panel or FRPO
H2 command
Front panel or FRPO
H4 command
Front panel [(1)
through (4) only] or
FRPO H5 command
FRPO D0 command
Default
RS-232C (factory set-
ting)
9600 (96)
8
None (0)
DTR [pos] & Xflow
[buf] (0)
Robust On (0)
FS-6750