NCR 7197 - Page 159

7197 Owner’s Guide Chapter 6: Commands
November 2002
141
4 On 10 16 Fixed to On
5 Off
On
00
20
0
32
Receipt paper present
Receipt paper exhausted
6 Off
On
00
40
0
64
Receipt paper present
Receipt paper exhausted
7 Off 00 0 Fixed to Off
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
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 print head overheating, can be
recovered from only by clearing the specific condition, such as loading paper or letting the
print head 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.
Example:
• MSComm1.Output = Chr$(&H1D) & Chr$(&H03) & Chr$(n)
Exceptions:
The command is ignored if n is out of range