OKI ML3390 01091308*01256402 User Manual
Product codes
01091308*01256402
D-15
Appendix D: Interface Data
When using a serial interface, set the menu options in above table as
required by your system´s interface.
required by your system´s interface.
After selection of the desired options it is recommended to print the
menu.
menu.
Transmission Protocols
You can select the two protocols for the serial transmission (inter-
face RS-232C and RS-422A) in the print menu as explained below.
face RS-232C and RS-422A) in the print menu as explained below.
The signal Busy is enabled (Busy), when less than 256 bytes are
available in the interface buffer. The signal is disabled (Ready) after
200 ms or 1 second if sufficient buffer capacity has been freed with-
in this period of time. If printing the buffer takes longer than 200 ms
or 1 second the signal is disabled (Ready), as soon as sufficient ca-
pacity is available.
available in the interface buffer. The signal is disabled (Ready) after
200 ms or 1 second if sufficient buffer capacity has been freed with-
in this period of time. If printing the buffer takes longer than 200 ms
or 1 second the signal is disabled (Ready), as soon as sufficient ca-
pacity is available.
This protocol uses the ASCII characters DC3 (decimal 19) and DC1
(decimal 17) for the control of data transmission. As soon as there
are less than 256 bytes available in the buffer, the code DC3 informs
the sender that no more data can be received. The code DC3 is
transmitted until no more data is transmitted. If it is possible to
print the buffer within 200 ms or 1 second after having sent a DC3
signal, a DC1 signal displays 200 ms or 1 second after sufficient ca-
pacity has been freed that the printer is ready to receive data. If it
takes longer than 200 ms or 1 second to release the buffer, the code
DC1 is sent as soon as sufficient capacity is available.
(decimal 17) for the control of data transmission. As soon as there
are less than 256 bytes available in the buffer, the code DC3 informs
the sender that no more data can be received. The code DC3 is
transmitted until no more data is transmitted. If it is possible to
print the buffer within 200 ms or 1 second after having sent a DC3
signal, a DC1 signal displays 200 ms or 1 second after sufficient ca-
pacity has been freed that the printer is ready to receive data. If it
takes longer than 200 ms or 1 second to release the buffer, the code
DC1 is sent as soon as sufficient capacity is available.
For both protocols the time period of 200 ms or 1 second can be
selected in the menu option Busy Time.
selected in the menu option Busy Time.
Connections of the RS-422A Interface
In the RS-422A interface, the incoming and outgoing signals are con-
nected to the ports via differential circuits. Therefore two lines are re-
quired for each signal to be transmitted. The inverted signals are iden-
tified with "+" and the non-inverted signals are identified with "-".
nected to the ports via differential circuits. Therefore two lines are re-
quired for each signal to be transmitted. The inverted signals are iden-
tified with "+" and the non-inverted signals are identified with "-".
Four lines are required for this connection, two for the data sent to
the printer and two for the status message sent from the printer to
the computer.
the printer and two for the status message sent from the printer to
the computer.
Ready/Busy
X-ON/X-OFF