zpl.tools
CommandsSystem configuration

^JU - Configuration Update

Saves, restores, or resets printer configuration

^JU - Configuration Update

Overview

The ^JU command sets the active configuration for the printer. It provides three options: save current settings to be used at power-on, reload factory default values, or recall the last saved configuration values.

Syntax

^JUa

Parameters

  • a = Configuration action (required)
    • S = Save current settings (used at power-on)
    • F = Reload factory default values
    • R = Recall last saved configuration values

Description

  • Manages printer configuration persistence
  • Saves current settings to non-volatile memory
  • Restores factory defaults
  • Recalls previously saved configuration
  • Affects power-on behavior and default settings

Configuration Actions

Save (S)

  • Saves all current printer settings
  • Settings become default at next power-on
  • Includes print mode, media settings, communication params, etc.
  • Overwrites previously saved configuration

Factory Reset (F)

  • Restores all factory default values
  • If not saved first, settings lost at power off
  • Resets print mode, media settings, communication parameters
  • Erases saved configuration from memory

Recall (R)

  • Restores last saved configuration
  • Returns to settings saved with ^JUS
  • Settings used at power-on by default
  • Useful for reverting to known good state

Usage Notes

  • Instruction ignored if parameter is missing or incorrect
  • Factory values are lost at power off unless saved with ^JUS
  • All media settings, print modes, and communication parameters are included
  • Configuration persists across power cycles after being saved

Examples

Save Current Configuration

^JUS

Saves all current settings to be used at power-on.

Reload Factory Defaults

^JUF

Resets printer to factory configuration.

Recall Last Saved

^JUR

Restores the last saved configuration.

Typical Workflow

  1. Configure printer - Set all desired parameters
  2. Save settings - ^JUS to make them permanent
  3. Power off/on - Printer restarts with saved configuration
  4. If needed, reset - ^JUF to restore defaults, then ^JUS to save
  • ^KL - Define Language
  • ^KP - Define Password
  • ^SC - Set Communications
  • ^MM - Print Mode
  • ^MN - Media Tracking

See Also

On this page

^JU - Configuration UpdateOverviewSyntaxParametersDescriptionConfiguration ActionsSave (S)Factory Reset (F)Recall (R)Usage NotesExamplesSave Current ConfigurationReload Factory DefaultsRecall Last SavedTypical WorkflowRelated CommandsSee Also