Advertisement
B-4
APPENDIX 8
_ _ _ _ _ _ _ _ _ _ _ _
beginning (SOH or ETX) and/or a command at
the end (CR, LF, ETX). Each block of data is
also limited to either a maximum of 2048 or 256
characters (depending on the setting of Switch
16. See page B-8.)
The computers on today's market commonly use
protocols that are "Unblocked ." Unblocked
protocols do not use a command to specify a
block of data and there is no block length limi-
tation. (Protocols
@
and
CD .)
The printer
continues to accept data from the computer un-
til the print buffer has room left for no more
than 256 characters. At that time the printer
sends a busy signal to the computer, stopping
transmission of any more data until the print
buffer is emptied or 200ms have elapsed (which-
ever is longer)
.
@
Printer Ready/Busy
(OKI SIMPLEX BUSY)
:
A block protocol that permits the computer to
transmit data until the print
buffe
r can hold only
25 6 more characters. It then searches for a car-
riage return (CR} or linefeed (LF} command (de-
pending on the setting of Switch 8) and, upon
receipt
,
sends out a busy signal to advise the
computer to stop transmitting until the buffer is
empty
.
When a parity or framing error occurs
,
it is substituted by the
@
or
/\
sign respectively.
For baud rat
e
settings of 4800 or higher
,
th
e
printer's busy sign al com es on when the block
end code is received and remains on until the
buffer becomes
empty.
Set Switches 9 through 11 as
fo
llows:
SW9
ON
SW10 ON
SW11 ON
Advertisement
