Wincor Nixdorf TH250, Programmer'S Manual

Page: 45 / 182

TH250 Programmer’s Guide
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Prints the first character of the next print line in column n. It must be sent for each line not printed
at column one. The value of n is set to one after each line.
Exceptions
This command cannot be used with single- or double-density graphics.
Related information
This is ignored in LEGACY emulation and the parameter byte goes into the print buffer.
Set absolute starting position
ASCII ESC $ n L n H
Hexadecimal 1B 24 n L n H
Decimal 27 36 n L n H
Value of n : n = Number of dots to be moved from the
beginning of the line.
n L = Remainder after dividing n by 256.
n H = Integer after dividing n by 256.
The values for
n L and n H are two bytes in low byte, high byte word orientation.
Sets the print starting position to the specified number of dots (up to the right margin) from the
beginning of the line. The print starting position is reset to the first column after each line.
Formulas
The example shows how to calculate 280 dots as the absolute starting position.
28 x 10 =
280 dots (beginning of column 29)
280/256 = 1, remainder of 24
n L = 24 n H = 1
Related information
If the set horizontal and vertical motion units command (1D 50) is used to change the horizontal
and vertical minimum motion unit, the parameters of the set relative print position command will
be interpreted accordingly. For more information, see the description of the command set
horizontal and vertical minimum motion units command (1D 50) in this document.
Compatibility information (TH250 receipt vs. A793 receipt)
There is a difference in the normal behavior of this command in A793 emulation mode as
compared to the original A793. The difference exists when the command is used to move to the
left. The A793 processes the whole print string prior to putting it in the buffer for the print head.
This method of processing allows the A793 to backup in the print string and replace characters and
their associated attributes when a “Set relative print position” command instructs the printer to
move the print position to the left.
In order to improve the speed of printing, the TH250 moves the data into a buffer for the
printhead when it receives it. When the “Set relative print position” command contains a move to
the left, this causes the new data to overstrike the previous data. This behavior can be used to an
application’s advantage to provide the ability to create compound characters on the receipt
station.
This command also functions differently in the A793 emulation when used in graphics: