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Michael PearsonAug 16, 2025
Why is the ERR LED on in my ABB Industrial Equipment?
- BBrett IbarraAug 16, 2025
If the ERR LED is lit on your ABB Industrial Equipment, it indicates a PLC issue with an event or an unacknowledged alarm. To resolve this, use Automation Builder, an IEC application, or another external access method available in your project, such as a control panel, to identify and acknowledge the diagnostic messages. In Automation Builder, you can access these messages by double-clicking on the device and selecting the 'Diagnosis' tab.