HMI Design Best Practices for Industrial Automation

Human Machine Interface design is one of the most underappreciated skills in industrial automation. A well-designed HMI helps operators monitor processes efficiently, respond quickly to abnormal situations and make fewer errors. A poorly designed HMI can lead to operator confusion, missed alarms and even industrial accidents.

The ISA 101 standard provides guidelines for HMI design in industrial automation. Key principles include the use of grey backgrounds instead of dark or bright colours, minimal use of colour reserved for conveying meaning, consistent navigation hierarchies and appropriate level of detail at each screen level.

Colour management is particularly important. Many traditional HMI designs use bright, multicoloured graphics that actually hinder operator performance. Modern high-performance HMI design uses subdued colours for normal conditions, reserving bright colours exclusively for abnormal situations that require operator attention.

Alarm management is another critical aspect. The ISA 18.2 alarm management standard addresses the problem of alarm floods -- situations where operators receive so many alarms that they cannot respond effectively. Proper alarm rationalisation, shelving and suppression strategies are essential. At EDWartens, HMI training in Bangalore covers these best practices alongside practical skills in WinCC and FactoryTalk HMI development.