E2-29

Invalid Option Board Combination

ABB · System

What does E2-29 mean?

The CPU has detected an unsupported or invalid combination of plugged option boards. This hardware configuration error can prevent the CPU from starting or operating correctly, as the system does not recognize the installed modules. This requires physical verification of the setup.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Ensure all option boards are properly seated and secured in their slots.

  2. 4

    Perform a power cycle after making changes to allow the CPU to re-detect the hardware.

Source: ABB System
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