RS-232C Protocol
C-9
H5: Protocol logic
The factory setting is 0.
H6: Buffer nearly-full threshold
This is a percentage from 0 to 99. The factory setting is 90.
H7: Buffer nearly-empty threshold
This is a percentage 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 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.
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.
Parameter value
Meaning
0
Combination of 1 and 3 below
1
DTR/DSR, positive logic
2
DTR/DSR, negative logic
3
XON/XOFF
4
ETX/ACK
5
XON/XOFF recognized only as protocol
Serial interface error
error not handled
error handled
Timing of XON
transfer to host while
Ready or Waiting
XON sent every
3-5 seconds
D0=0 (default)
D0=1
XON not sent
D0=10
D0=11
Содержание Ecosys FS-1800
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