Rs-232C Protocol - Kyocera Mita FS-9500DN Operation Manual

Appendix C Host Computer Interface

3. RS-232C Protocol

A protocol is a set of rules the computer follows in sending data
to the printer. They are indicated on the status page. Parameters
can be changed from the operator panel. See
Interface Modes on page 3-19. The parameters and their identi-
fication codes are given below.
H1: Baud rate
Parameter value Baud rate
12
24
48
96
19
38
57
11
The factory default setting is 9600 baud.
NOTE
Some computers may not be compatible with a baud rate of
115200 bps. If you set the baud rate to 115200 and communica-
tion problems occur, lower the baud rate.
H2: Data bits
7 or 8; the factory default setting is 8.
H3: Stop bits
1 or 2; the factory default setting is 1.
H4: Parity
Parameter value Meaning
0
1
2
3
The factory default setting is None (0 on the status printout).
C-3
Changing Serial
1200
2400
4800
9600
19200
38400
57600
115200
None
Odd
Even
Ignore
H5: Protocol logic
Parameter value
0 Combination of 1 and 3 below
1 DTR, positive logic
2 DTR, negative logic
3 XON/XOFF
4 ETX/ACK
5 XON/XOFF recognized only as protocol
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 nearly-
empty thresholds (H6 and H7) are subject to change without no-
tification.
The gap between the nearly-full and nearly-empty thresholds al-
lows the computer to send a fairly large amount of data in a con-
tinuous stream.
H8: Received-data buffer size
This is the size of the input buffer, specified in units of 10 Kbytes.
The factory default setting is 6, meaning 60 Kbytes.
PRESCRIBE FRPO D0 command
The PRESCRIBE FRPO D0 command is provided to allow ma-
nipulating XON/XOFF when an error has occurred on the serial
interface. The following table summarizes the error status corre-
sponding to different D0 values.
Timing of XON transfer to host
while Ready or Waiting
XON sent every 3 to 5 seconds
XON not sent
Meaning
Serial interface error
Error Error
not handled handled
D0=0 D0=1
(default)
D0=10 D0=11