CognitiveTPG A799 - Manual (Page 93)

Chapter 4: Programming Commands 93 Revision D 12/09
A799-PG00001D
Real time request to printer
GS sequence DLE sequence
ASCII GS ETX n DLE ENQ n
Hexadecimal 1D 03 n 10 05 n
29 3 n 16 5 n
Value of n: 1 = recover and restart
2 = recover and clear buffers
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.
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.
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.
The same error recovery possibilities exist as for n = 1.
Exceptions
The command is ignored if n is out of range.
An application using DLE (0x10) sequence must send ENQ within 100 milliseconds of DLE or the printer will
misinterpret the DLE and execute a clear printer command. Avoid this possibility by using the ID 03 n sequence, that is
handled exactly the same as 10 05 n.