F127

DSIFlashUpdatReq

Allen-Bradley · PowerFlex 520-series Adjustable Frequency AC Drive

What does F127 mean?

A critical firmware problem has been detected, forcing the drive to operate using backup firmware which only supports DSI communications. This is a degraded operating mode with limited functionality. A full firmware flash update via DSI is necessary to restore complete drive features and stable operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Verify the integrity and compatibility of the firmware file being used for the update.

Source: Allen-Bradley PowerFlex 520-series Adjustable Frequency AC Drive
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