Head Test Non-Fatal

~JO configures head Test Non-Fatal. It applies to the printer session and subsequent formats and controls printer hardware or connectivity rather than label pixels.

ZPLr compatibility note

Recognized by the renderer but has no label-raster effect.

These are code examples only. This printer or session command does not produce a standalone label image.

Syntax

~JO

This command form has no parameters.

~JO basic example

Shows the parameterless command form in a complete ZPL sample.

Edit in editor

ZPLtilde-jo-basic-1.zpl

~JO

Primary source

Official Zebra reference

Use the manufacturer reference for printer- and firmware-specific behavior beyond ZPLr’s pinned rendering profile.

Open Zebra documentation