Code Tables - Hitachi RX Technical Manual

5.4 Code Tables

5.4.1 Code Tables
(1)Transmission control
ASCII
02H
03H
05H
06H
0EH
0FH
10H
12H
13H
15H
1BH
1FH
5-33 ●Code tables
Name
STX
Code that is transmitted immediately before text.
(start)
ETX
Code that is transmitted immediately after text.
(end)
This enquiry code is used when the external device checks whether
the IJ printer is ready for signal reception. This code must be
ENQ transmitted before data transmission to the IJ printer. When the IJ
(enquiry) 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.
1
ACK
(acknowledgment)
2
SO When the 1-byte transmission mode prevails, this code is positioned
(shift out) at the end of 2-byte code for transmission purposes.
SI When the 1-byte transmission mode prevails, this code is positioned
(shift in) at the beginning of 2-byte code for transmission purposes.
DLE This code is positioned at the beginning of printings for each print
(start of item) item for transmission purposes.
This code is transmitted if the printings need to be changed before
the printing of the contents transmitted to the IJ printer while the
DC2
overwrite-protected mode prevails. After receipt of this code, the
(retransmission)
IJ printer transmits the ACK code and becomes ready for reception.
However, if the IJ printer is off-line, the "NAK" code is transmitted.
The same as DC2.
DC3
However, when receiving DC3, the IJ printer terminates printing
(retransmission)
forcibly.
1
NAK
2
(negative
acknowledgment)
This code is positioned at the beginning of a header for transmis-
ESC sion purposes. The header is a code that recognizes the transmission
(start of header) data type and is transmitted next to STX.
(Existing machine / message specs.)
This code is positioned at the beginning of a header for transmis-
ESC2
sion purposes. The header is a code that recognizes the transmission
(start of header)
data type and is transmitted next to STX.
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.
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)
Description