~JN
~JN

~JN

The
~JN
command turns on the head test option. When activated,
~JN
causes the printer to halt when a head test failure is encountered.

Head Test Fatal

Once an error is encountered the printer remains in error mode until the head test is turned off (
~JO
) or power is cycled.
Format:
~JN
Comments:
If the communications buffer is full, the printer is not able to receive data. In this condition, the
~JO
command is not received by the printer.