Specifications

Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET NEXT
D
TM-U230 series
Specification
(STANDARD)
App.15 App.14
APPENDIX F: NOTES ON RECEIVING REAL-TIME COMMANDS WHILE
THE PRINTER IS BUSY
The real-time command is executed if the real-time commands can be received even when the printer
is busy. It depends on the type of interface whether the real-time command can be received or not
while the printer is busy.
Table F.1 Receiving Method of the Real-time Command while the Printer is Busy
Type of interface Receiving method of the real-time command while the printer is busy
Serial interface The printer can receive the real-time command if the host PC sends the
real-time command even though the host PC does not confirm whether the
printer is ready to receive or not.
Parallel interface Impossible to receive the real-time command.
Ethernet interface The host PC sends the real-time command to the printer directly after the host
PC sends the special command which makes the command sending
compulsory. (See below for details)
[Specifying the compulsory transmission with the special command]
Protocol: UDP/IP
UDP Port number: 3289
Specifying the compulsory transmission:
Receives the receive character strings after sending the transmission
character strings to the printer.
Transmission character strings:
“EPSONC”,<03h><00h><00h><15h><00h><00h><00h><01h><01h>
Receive character strings:
“EPSONc”,<03h><00h><00h><15h><00h><00h><00h><01h><01h>
Releasing the compulsory transmission:
Receives the receive character strings after sending the transmission
character strings to the printer.
Transmission character strings:
“EPSONC”,<03h><00h><00h><15h><00h><00h><00h><01h><00h>
Receive character strings:
“EPSONc”,<03h><00h><00h><15h><00h><00h><00h><01h><00h>
NOTE: The transmission character strings must be in one packet.
END