Group Indicator Flashing Red

Faults Present in Undisplayed Group Channels

Allen-Bradley · Compact 5000 Digital I/O Modules

What does Group Indicator Flashing Red mean?

The Group A or Group B indicator is flashing red, signifying that I/O status is NOT currently displayed for this group of channels, but at least one fault exists on channels within this group. This serves as an alert that a fault is present in a non-active channel group.

Common Causes

  • One or more individual I/O channels within the non-displayed group (Group A or Group B) have an active fault condition.
  • The Group A or Group B button has not been pressed to display the status for the faulted group.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Press the physical Group A or Group B button on the module faceplate to switch the display to the faulted group of channels.

  2. 2

    Examine the individual channel I/O status indicators (if available on the module faceplate) for specific fault indications once the group is displayed.

  3. 3

    Access the module's diagnostic information in Studio 5000 Logix Designer to pinpoint the specific channel faults within the group.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Allen-Bradley Compact 5000 Digital I/O Modules