Appendix C Host Computer Interface

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.

Note _____________________________________________________________________

Since DTR/DSR protocol is not used with the RS-422A standard, select a parameter value other than 0, 1, or 2 for the H5 setting when using the RS-422A interface.

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. The following table summarizes the error status corresponding to different D0 values.

 

 

 

Serial interface error

 

 

 

error not handled

 

error handled

Timing of XON transfer to

XON sent every 3-5

D0

= 0 (default)

D0

= 1

host while Ready or

seconds

 

 

 

 

Waiting

 

 

 

 

 

 

XON not sent

D0

= 10

D0

= 11

C-13

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Kyocera FS-600 manual Prescribe Frpo D0 command, H8 Received-data buffer size