1302

Option software in slot C1 too old

Danfoss · VLT AutomationDrive FC 301/302

What does 1302 mean?

The software installed on the option card in slot C1 is outdated.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 C1 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 C1 failed or was incomplete.
  • Corrupted firmware file used during a failed update attempt for the option card in Slot C1.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Identify the installed option card in Slot C1 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 C1.

  3. 3

    3. Download the correct, updated firmware file for the option card in Slot C1 from the manufacturer's support portal.

  4. 4

    4. Perform the firmware update procedure for the option card in Slot C1 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: March 2026

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Source: Danfoss VLT AutomationDrive FC 301/302