Xerox FS-C8008DN User Manual
B.4 RS-232C Protocol
B-8
H4: Parity
The factory setting is 0 (none).
H5: Protocol logic
The factory setting is 0.
H6: Buffer nearly-full threshold
A percentage value from 0 to 99. The factory setting is 90.
H7: Buffer nearly-empty threshold
A percentage value from 0 to 99. The factory setting is 70. The factory settings of the buffer
nearly-full and nearly-empty thresholds (H6 and H7) are subject to change without notice.
nearly-full and nearly-empty thresholds (H6 and H7) are subject to change without notice.
The difference between the nearly-full and nearly-empty thresholds allows the computer to
send a fairly large amount of data in a continuous stream.
send a fairly large amount of data in a continuous stream.
H8: Received data buffer size
The input buffer size is specified in increments of 100 kB. The factory setting is 5 (500 kB).
B.4.2
PRESCRIBE FRPO D0 Command
The PRESCRIBE FRPO D0 command is provided to allow manipulating XON/XOFF when
an error has occurred on the serial interface.
an error has occurred on the serial interface.
summarizes the error status
corresponding to different D0 values.
Parameter value
Meaning
0
None
1
Odd
2
Even
3
Ignored
Parameter value
Meaning
0
Combination of DTR (positive logic) and XON/XOFF
1
DTR (positive logic)
2
DTR ( negative logic)
3
XON/XOFF
4
ETX/ACK
Timing of XON transfer to
host while Ready or Waiting
host while Ready or Waiting
Serial interface error
error not handled
error handled
XON sent every 3-5 seconds
D0=0 (default)
D0=1
XON not sent
D0=10
D0=11
Table B-5