Emulations; General; Escape Sequences; What Are Escape Sequences - Tally T2040 Reference Manual

Emulations

General

Escape sequences

What are escape
sequences?

MTPL sequences

What are control
codes?
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When a printer understands the control set written for another printer type,
it is said to emulate the other printer. Your printer emulates, i.e. "under-
stands" the IBM Proprinter X24e/XL24e and the Epson LQ 850/1050 in its
standard 24 needle version.
Escape sequences or control codes tell the printer that the following trans-
mitted code is a printer command and not a printable character. They allow
the selection of printer functions or the changing of printer parameters from
the computer. By transmitting an escape sequence, you are able to change
the previously set configuration of the printer (e.g. character set).
Generally, an escape sequence consists of an ESCape control character
(ESC = decimal 27 or hexadecimal 1B) followed by one or more characters,
which represent commands to the printer. The control character ESC followed
by the character "4" tells your printer to print the following text in italics.
Apart from the standard Escape sequences and control codes your printer
is equipped with MTPL sequences (MTPL = Tally Printer Language).
These sequences provide a large number of additional ways to control
your printer. Many functions can only be carried out using the MTPL se-
quences as you will see when you look at the list of available command
codes.
Control codes are similar to escape sequences because they instruct the
printer to do a specific function. However, unlike escape sequences, con-
trol codes do not begin with the ESC control code. Instead, they consist of
special single-character non-printing commands (e.g. LF, FF, DC2).
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