Oki ML1120, Technical Reference Manual

Page: 32 / 254

Technical Reference Guide – Interface specifications > 32
X-ON/X-OFF protocol
Timing chart
NOTE
L
OCAL TEST FUNCTION
Circuit Test mode setting
Diagnostic: Test set by menu
Block format Free
Error indication The parity error indication character is converted
into code 40(H).
Busy state indication The DC3 will be sent to the transmission side
immediately after the space in the interface buffer
has become less than 256 bytes to indicate that
receiving is impossible. The transmission of the
DC3 stops when data receiving has stopped. If the
recovery time for 256 bytes is within 200 ms or
1 second after the DC3 is sent, DC1 will be sent
200 ms or 1 second after the recovery to indicate
that receiving is possible. If the recovery time
exceeds 200 ms or 1 second, the DC1 is sent
immediately after the recovery has occurred.
200 ms or 1 second minimum
RD
TD PRINTING
ON
OFF
BUSY state
3-
C
D
3-
C
D
3-
C
D
1
C
D
256 characters or less
DATA 1
Waiting for BUSY
state to be free
DATA
If data is transferred when the printer is still BUSY, the printer
sends a DC3 code every time it receives data.