Page 220 - ZPL II Programming Guide

200 ZPL Commands
~JN

~JN

Head Test Fatal

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

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.

45541L-004 Rev. A ZPL II Programming Guide 9/15/06