Why HMI/Stack Lights?

Establishes a standard mapping between PackML state and machine stacklights and illuminated push-buttons.

Download Free PackML HMIs Document Summary

OMAC members can receive the full PackML HMIs– User Interfaces, Stacklights and Push Button Controls document for free! Just fill out this form and verified members of OMAC will be provided with the full document at no charge.

OMAC members can receive the full PackML HMIs– User Interfaces, Stacklights and Push Button Controls document for free! Just click here to login and access the full document at no charge.
Members-Only - Download Free PackML HMIs Document

Defines the requirements for on-screen PackML state model representations including the latest changes related to the TR88-2021 specification.


Illustrates the standard PackML user interface conventions including menu design and screen layout.


Provides numerous illustrations clarifying the standard’s intent to display acceptable and unacceptable design alternatives.


Promotes consistency across production lines to improve operator efficiency and increase interface learnability and memorability.

Offers general design guidance and presents common method for design evaluation.

The guidance was developed and reviewed with contributions from over 30 OMAC members.


For more information on HMI/Stack Lights and to get involved in the OMAC Packaging Workgroup, contact Patrick Toohey.