TransAct Ithaca 280 Programmer's Manual page 172

Programming Codes
[CAN] Clear print buffer
ASCII [CAN]
Hexadecimal 18H
Decimal <24>
IPCL &%RP
EPOS [CAN]
Description The [CAN] command clears the print buffer and any unprinted information
in the printer received before it. If the input buffer is not being processed
because the printer is out of paper or a form is not inserted, the [CAN]
command will not be processed until after the error is cleared. The [CAN]
command does not restore default conditions; it only clears the print
buffer.
[ESC] q Query marker
ASCII [ESC] q <n>
Hexadecimal 1BH 71H <n>
Decimal <27> <113> <n>
IPCL none
EPOS none
Description The [ESC] q <n> command returns a status to the host when it is
processed.
Response [SOH] <n>
The [ESC] q <n> command may be placed in the print data and, when
processed by the printer, will return a progress status marker. The value
of <n> can be any 8-bit value. It is returned to the host unaltered. The
intent is for it to be a sequence number. The command can be used to
track the print progress of the printer or verify that data has been printed.
Note: The [ESC] q <n> command is a line terminator that causes the
printer to print all previous data. If a normal line terminator like a [CR] is
not supplied, right justify and auto-center do not function correctly. All
data is left justified. [ESC] q does not perform a [CR] or [LF] function.
Page 160
iTherm
Rev K
®
280 Programmer's Guide