Programmer's Guide
PcOS Series 90PLUS
Printer
Control Codes
Miscellaneous Controls
12/16/99
Rev M
Page 77
5.13
Miscellaneous Controls
Function
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 the [CAN]. The CAN command does not restore default
conditions. It only clears the print buffers.
If the input buffer is not being processed (because the printer is out of paper or the
form is not inserted), the CAN command will not be processed until after the error
is cleared.
Function
Query marker
ASCII
[ESC] q <n>
Hexadecimal
1BH 71H <n>
Decimal
<27> <113>
IPCL
none
EPOS
none
Function
Return a status to the host during processing
Response
Serial/Parallel, IEEE 1284
Parallel, non-IEEE 1284
[SOH]<n>…
not supported via PE
Description
The command can 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 the data has been printed.
Note
The command is a line terminator and causes the printer to print all previous
data. If a normal line terminator (like a [CR]) is not supplied, right justify and
autocenter will not function correctly. All data will be left justified. [ESC] q
does not perform a [CR] or [LF] function.
Содержание PcOS series 90plus
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