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ErrorLib — Industrial Fault Code Library

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1299

Option software in slot A too old

Danfoss · VLT AutomationDrive FC 301/302

What does 1299 mean?

The software installed on the option card in slot A is outdated. This can lead to compatibility problems, missing functionalities, or unstable operation with the main drive software.

Common Causes

  • The option card's firmware in Slot A has not been updated to match the requirements of the drive's recently updated main firmware.
  • An older option card was installed into a drive with a newer main firmware without performing the necessary option firmware update.
  • The drive's main firmware includes a compatibility check that flags option cards with firmware below a minimum required version.
  • Previous attempt to update the option card firmware in Slot A failed or was incomplete.
  • Corrupted firmware file used during a failed update attempt for the option card in Slot A.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Identify the installed option card in Slot A and determine its current firmware version via the drive's LCP (e.g., P15-06).

  2. 2

    2. Verify the compatibility matrix (e.g., from manufacturer website) for the drive's main firmware (P15-05) and the required option card firmware in Slot A.

  3. 3

    3. Download the correct, updated firmware file for the option card in Slot A from the manufacturer's support portal.

  4. 4

    4. Perform the firmware update procedure for the option card in Slot A using the designated software tool (e.g., MCT 10, USB-to-RS485 adapter) or SD card.

  5. 5

    5. After updating, perform a power cycle of the drive and verify the new firmware version is correctly reported (e.g., P15-06).

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Verified technical data. Last updated: April 2026

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Source: Danfoss VLT AutomationDrive FC 301/302
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