HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

EN Troubleshooting Commands 24-13
When the printer is in display functions mode, all control codes and
escape sequences are printed and not executed, with the following
exceptions:
z CR is printed and executed as CR-LF.
z
E
C
Z is printed and executed.
Display functions mode instructs the printer to display rather than
execute the data it receives. The data is printed using the current
text area and selected font.
Note To print characters 0, 7-15, and 27 in fonts which have printable
characters in these positions (such as PC-8), the printer must be in
Display Function Mode, or be given a Transparent Print command.
Example
To enable display functions mode, send:
Note Most symbol sets do not have printable characters defined in the
control code decimal range 0 to 31 and 128 to 159. If a printable
character is not defined, a Space control code is printed while in
display functions mode. The PC symbol sets do have printable
characters defined in this range.
E
C
&s0C Enables end-of-line wrap to prevent data
truncation.
E
C
Y Enable Display Functions Mode.
z
z
z
Data sent to the printer.
z
z
z
E
C
Z Disable Display Functions Mode.