Millermatic Software Updates

Download the most up-to date, innovative software solutions for your welder.

By downloading this update, you are agreeing to the Terms & Conditions set forth by Miller Electric Mfg. LLC.

It is possible that your Miller equipment may contain third-party software, including open source software.  Check the bottom portion of the EULA web page for any licensing information or notices pertaining to third-party software for your specific Miller equipment. 

Your right to use this software is conditioned on compliance with the EULA.

Important! Be sure to download the correct software update for your model Millermatic. 

Millermatic 255 Updates Millermatic 355 Updates Millermatic 211 PRO Updates

Millermatic 255 Welders Software Updates

Release Notes

In Current Update Version 1.8:

New Software Versions

Weld Controller (Millermatic 255) – 85902

Release Notes:

• Fixes bug related to secondary +15V error annunciation
  

In Update Version 1.7:

New Software Versions

Weld Controller (Millermatic 255) – 83685
Weld Controller (Multimatic 255) – 83685

Release Notes:

• Fixes bug related to run-in and burnback

In Update Version 1.6:

New Software Versions

User Interface – 82896

Release Notes:

• Added “skip” indication on QR code screen
• Improved error message guidance when a software version mismatch exists between circuit
  boards

In Update Version 1.5:

New Software Versions

User Interface – 82134
Weld Controller (Millermatic 255) – 82134
Weld Controller (Multimatic 255) – 82134
Graphics – 0x5DF6B757
Weld Programs – 0x2E142B59

Release Notes:

• Enhanced Performance:
  • Weld starts when welding aluminum
  • MIG crater

• New Standard Features Added:
  • QR code screen on power-up screen that links to product page for helpful tips and tricks. (Note: this screen can be skipped by pressing one of the bottom buttons on the UI)
  • Duty cycle status indication on home screen
  • Input voltage phase indication on home screen
  • Arc Control adjustment accessible from home screen
  • Electronic parameter chart on home screen to allow for quick parameter setting
  • Metal Core weld program support
  • Adjustable MIG hot start setting
  • System menu setting for locks and limits
  • System menu setting to enable/disable Auto-Set feature
  • System menu setting to control connection diagrams enable/disable/timeout
  • System menu setting to enable/disable remove WFS potentiometer for spoolguns and push-pull guns
  • Extended EZ-Select (trigger-tap) program select to support all MIG guns, spoolguns, and push-pull guns
  • Remote potentiometer WFS adjustment functionality for spoolguns and push-pull guns in Auto-Set
  • Support for user defined programs for spoolguns and push-pull guns
  • Dedicated support for Pistol-Pro push-pull gun
  • MK Python push-pull gun support
  • Trigger hold (2T)
  • Foldback indication, consisting of feedback values turning red when machine foldback activates

• Reduced minimum WFS to 25 IPM to allow for slower run-in values

• Changed TIG Trigger Error message for Millermatic 255 to “10-pin Trigger Fault”

• Added more information to the USB service export

Millermatic 355 Welders Software Updates

Release Notes

In Current Update Version 1.4 - May 2026

New Software Versions

User Interface - 87517

Release Notes

• Fix an issue with numerical menu items causing the UI to reset when trying to set high values (introduced on v1.3 - UI version 87447)

In Version 1.3 - April 2026

New Software Versions

User Interface – 87447
Weld Controller – 87447
Weld Programs – 0x7BD8AD5B 

Release Notes

• Updated aluminum programs
• Allow locks and limits ranges to go to 100%
• Added System Menu setting for 10-pin gun override
• Reduced burnback times
• Various improvements and optimizations 

In Version 1.2 - April 2024

New Software Versions

Weld Controller - 83685

Release Notes

• Fixes bug related to run-in and burnback

In Update Version 1.1 - November 2023

New Software Versions

• User Interface - 82134
• Weld Controller - 82134
• Graphics - 0x5DF6B757
• Weld Programs - 0x2E142B59

Release Notes

• Updates to weld starts to improve aluminum performance
• Enabling adjustable hotstart for all MIG and Pulse MIG wires (was previously aluminum only)
• Reduced minimum WFS to 25 IPM to allow for slower run-in
• Added System Menu setting for Auto-Set disable
• Added serial number and software version info to exported USB logs
• Changed TIG Trigger Error message to 10-Pin Trigger Fault
• Bug fixes related to Invalid Weld Data error occurring during machine setup
• Bug fixes related to errors occurring during operation with remote pot WFS adjustment disabled

Millermatic 211 PRO Welders Software Updates

Release Notes

Version 1.6.10 - May 7, 2026
New Software Versions
Weld Controller - 1.6.10
User Interface - 1.6.10
Motor Controller - 1.6.10

Release Notes:

• Added Pulsed MIG (Dyna-Pulse™) Process
• Added BeadVision™ to show the user how changing weld parameters affects the properties of a weld
• Added User Savable Programs to User Interface
• Added MIG/Pulsed MIG Crater Settings
• Backwards compatible removal of gas detection, conditional on whether the switch detects pressure or the setting has been previously enabled

In Update Version 1.4.10 – January 13, 2026
New Software Versions
User Interface – 1.4.10

Release Notes:

• Fixes a bug where certain Auto-Set parameters toward the boundaries will cause a software assert.

In Update Version 1.4.8

New Software Versions

• Weld Controller - 1.4.8
• User interface - 1.4.8

Release Notes:

• Fixes bug related to reporting shorted thermistor errors as open and open thermistor errors as shorted.
• Updated alert/error icon to reflect operator alert status.
• Added the timestamp of the last Diagnostic Help Code occurrence to the exported USB log.
• Improved low-line 240V operation.

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