Kyocera Mita FS-1800/N User Manual page 211

RS-232C Protocol
H5: Protocol logic
Parameter value
0
1
2
3
4
5
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 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 default setting is 6, meaning 60 Kbytes.
PRESCRIBE 2e FRPO D0 command
The PRESCRIBE 2e FRPO D0 command is provided to allow manipulating
XON/XOFF when an error has occured on the serial interface. The
following table summarizes the error status corresponding 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
Combination of 1 and 3 below
DTR, positive logic
DTR, negative logic
XON/XOFF
ETX/ACK
XON/XOFF recognized only as protocol
Error not handled
D0=0 (default)
D0=10
C-8
Serial interface error
Error handled
D0=1
D0=11