●Code tables 5-37
5.4 Code Tables
5.4.1 Code Tables
(1)Transmission control
ASCII Name Description
02H
STX
(start)
Code that is transmitted immediately before text.
03H
ETX
(end)
Code that is transmitted immediately after text.
05H
ENQ
(enquiry)
This enquiry code is used when the external device checks whether
the IJ printer is ready for signal reception. This code must be
transmitted before data transmission to the IJ printer. When the IJ
printer is ready for reception, the "ACK" code is transmitted after
ENQ code reception. If the IJ printer is not ready for reception, the
"NAK" code is transmitted.
06H
ACK
(acknowledgment)
When the IJ printer is ready for reception, it transmits this code in
response to an "ENQ" code reception from the external device.
This code reports that text reception is normally completed.
0EH
SO
(shift out)
When the 1-byte transmission mode prevails, this code is positioned
at the end of 2-byte code for transmission purposes.
0FH
SI
(shift in)
When the 1-byte transmission mode prevails, this code is positioned
at the beginning of 2-byte code for transmission purposes.
10H
DLE
(start of item)
This code is positioned at the beginning of printings for each print
item for transmission purposes.
12H
DC2
(retransmission)
This code is transmitted if the printings need to be changed before
the printing of the contents transmitted to the IJ printer while the
overwrite-protected mode prevails. After receipt of this code, the
IJ printer transmits the ACK code and becomes ready for reception.
However, if the IJ printer is off-line, the "NAK" code is transmitted.
13H
DC3
(retransmission)
The same as DC2.
However, when receiving DC3, the IJ printer terminates printing
forcibly.
15H
NAK
(negative
acknowledgment)
The IJ printer transmits this code if it is not ready for reception
when it receives the "ENQ" code from the external device.
This code reports that text reception is not normally completed
(when, for instance, the received data is in transmission error or
an unregistered print data number is received)
1BH
ESC
(start of header)
This code is positioned at the beginning of a header for transmis-
sion purposes. The header is a code that recognizes the transmission
data type and is transmitted next to STX.
(Existing machine / message specs.)
1FH
ESC2
(start of header)
This code is positioned at the beginning of a header for transmis-
sion purposes. The header is a code that recognizes the transmission
data type and is transmitted next to STX.
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