KYOCERA FS-3700 User Manual download pdf (Page 111)

H5: Protocol logic

Parameter value Meaning

Combination of 1 and 3 below

DTR/DSR, positive logic

2 DTR/DSR, negative logic

3 XON/XOFF

ETX/ACK

XON/XOFF recognized only as protocol

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 sub-

ject 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 10K bytes. The factory-set value is 6

meaning 60K bytes.

☛ Since DTR/DSR protocol is not used with the RS-422A standard, select a pa-

rameter value other than 0, 1, or 2 for the H5 setting when using the RS-422A

interface.

PRESCRIBE II FRPO D0 command

The PRESCRIBE II FRPO D0 command is provided to allow manipulating XON/XOFF when an er-

ror has occured on the serial interface. The following table summarizes the error status corre-

sponding to different D0 values.

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

C.3. RS-232C/RS-422A Protocol

C-11

1 2 ... 106 107 108 109 110 111 112 113 114 115 116

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KYOCERA FS-3700 User Manual Page 111