User`s guide

Exiting Non-PostScript Printer Languages
To exit a non-PostScript language such as HP PCL, you must send
a command in the HP language since that is all your printer
understands at that time. HP commands are called “escape
sequences” since they begin with the ASCII value for an escape
key.
Escape Sequence Syntax
The generic version, or syntax, of an escape sequence is
Syntax: <ESC><DEL><Ø><Ø4>
<ESC> The <ESC> character must have a decimal value of 27.
You need to find a way to enter the hexadecimal,
decimal, or octal value, depending on your system. (To
enter the escape code most systems require you to press
the ALT key while typing Ø27 on the numeric keypad.)
<DEL> The <DEL> character must have a decimal value of
127. You need to find a way to enter the hexadecimal,
decimal, or octal value, depending on your system. (To
enter the escape code most systems require you to press
the ALT key while typing 127 on the numeric keypad.)
<Ø> The Ø parameter is the numerical value that indicates
the exit to PostScript.
<Ø4> The <Ø4> parameter is the end-of-file character. To
enter a <Ø4> character on most systems, hold down the
ALT key and press ØØ4 on the numeric keypad.
NOTE: You cannot exit directly to the default ESP mode. You
must first exit to PostScript (Ø) using the escape sequence
or the EXIT_HP.SET file from the PS Executive Series
Utilities; then return to ESP using the appropriate port
command in the “Using the setdefaultemulation and
setemulation Commands” section.
Chapter 3
Selecting Printer Languages 3-11