Instruction manual

A758 Owner’s Guide Chapter 7: Programming Guide
September 1999 169
Real Time Request to Printer
GS Sequence DLE Sequence
ASCII
:GS ETX
n
or DLE ENQ
n
Hexadecimal
: 1D 03
n
or 10 05
n
Decimal:
29 3
n
or 16 5
n
Value of
n
:
1 = Recover and restart
2 = Recover and clear buffers
3 = Cancel slip waiting
The printer responds to a request from the host specified by
n
. This command
includes two sequences: GS and DLE. The operations performed depend on the
value of
n,
according to the following parameters.
n
= 1:
Restarts printing from the beginning of the line where an error occurred, after
recovering from the error. Print settings that are normally preserved from line to
line, such as character height and width, are still preserved with this command.
This sequence is ignored except when the printer is busy due to an error
condition.
If the receipt is selected, this command will attempt recovery from a knife error.
Other errors associated with the receipt, such as paper out or printhead
overheating, can be recovered from only by clearing the specific condition, such
as loading paper or letting the printhead cool down.
If the slip is selected, this command will attempt recovery from a slip motor or
flip jam by re-homing the printhead and waiting for a slip to be inserted before
restarting the print. Other errors associated with the slip, such as cassette door
open, can be recovered from only by clearing the specific condition, such as
closing the cassette door.
n
= 2:
Recovers from an error after clearing the receive and print buffers. Print settings
that are normally preserved from line to line, such as character height and width,
are still preserved with this command. This sequence is ignored except when the
printer is busy due to an error condition.
If the slip was selected when the error occurred, the receipt becomes selected
when the buffers are cleared. When printing on the slip is to continue, the slip
must be selected again.
The same error recovery possibilities exist as for
n
= 1.
n
= 3:
Cancels the slip waiting status. This sequence is ignored except when the printer
is waiting for a slip to be inserted.
When slip waiting is canceled, the receive and print buffers are cleared and the
receipt is selected. When printing on the slip is to continue, the slip must be
selected again.
(Real Time Request to Printer—continued on the next page)