Oki MICROLINE ML380 Maintenance Manual page 311

7) Interface Control Code
The following function codes are used in the high-speed serial interface:
Note: Characters to be printed according to the parity error indication code (40)H will
differ depending on the setting of the printer character set. Refer to Printer User's
Manuals.
(a) Ready/Busy protocol
Block format
Error indication
Busy state indication : The busy signal turns on (becomes Busy) when the room of
Timing chart:
RD
8K
Threshold of the
characters in
512
the buffer
0
SSD
(b) X-ON/X-OFF protocol
Block format
Error indication
Busy state indication : The DC3 will be sent to the transmission side immediately
40959201TX Rev.1
Command
DC1 (17)D (11)H
DC3 (19)D (13)H
: Free
: The parity error indication is printed as character 40(H).
the interface buffer has become less than 256 bytes. The
busy signal turns off (becomes Ready) after 200 ms or 1
second has passed if 256 bytes have recovered within 200
ms or 1 second. If the timing of recovery exceeds 200 ms
or 1 second, the busy signal turns off (becomes Ready)
immediately after the recovery has occurred.
DATA 1
ON (BUSY)
OFF (READY
: Free
: The parity error indication character is converted into code
40(H)
after the room in the interface buffer has become less than
256 bytes to inform that receiving is impossible. The
transmission of the DC3 stops when the data receiving has
stopped. If the timing of recovery of 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 inform that receiving is
possible. If the timing of recovery exceeds 200 ms or 1
second, the DC1 is sent immediately after the recovery has
occurred.
Code
200 ms or 1 second minimum
DATA 2
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