Canon MF820Cdn User's Guide download pdf (Page 20)

Control Codes

2-7

Getting Started

FreeScape Codes

PCL codes always begin with the unprintable escape code Hexa: 1B or Dec: 27. Some

systems cannot use or send binary data to a device, which can represent a problem when

using the PCL language with bar codes. An example of this kind of system is a mainframe

computer with printers connected to terminals. To avoid conflicts between the PCL language

and bar codes in such a system, the FreeScape Code, a user-defined Escape Code or AEC

(Alternate Escape Code) can be specified.

FreeScape acts exactly like the standard escape code when it is located at the beginning of

a regular PCL font sequence. The default value for the AEC is a '~' (tilde). FreeScape

ignores the AEC if it is determined to be pure data. You can also mix escape codes and

alternate escape codes.

The AEC can be any one of the following 10 characters:

", #, $, /, \, ?, {, }, |, ~.

The PCL font sequence to change to the alternate escape code is as follows:

<Esc or AEC>**#J

# represents the ASCII decimal value of the new AEC or ESC. Values for AEC are 34 ("), 35

(#), 36 ($), 47 (/), 92 (\), 63 (?), 123 ({), 125 (}), 124 (|), or 126 (~). The value for ESC is 27. If

you indicate 27, it disables the FreeScape Code.

NOTE

•

The FreeScape escape sequence setting is only valid for the current job.

•

The FreeScape Code can be enabled, disabled, or set as a parameter for all jobs from the

FreeScape menu in Printer Settings (from the Settings/Registration screen).

•

When FreeScape is disabled, only the escape code (Hexa: 1B or Dec: 27) can be used to start PCL

commands.

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Canon MF820Cdn User's Guide Page 20