F40001

Fault at DRIVE-CLiQ socket X101

Siemens · SINAMICS S120/S150 Reference List

What does F40001 mean?

A general fault has been detected at the drive object connected to the DRIVE-CLiQ socket X101. The fault value (r0949) provides information about the specific underlying fault that first occurred for this drive object. This fault requires immediate acknowledgment.

Common Causes

  • Faulty or damaged DRIVE-CLiQ cable connecting to socket X101, leading to loss of communication or data errors.
  • The DRIVE-CLiQ component (e.g., motor module, encoder, sensor box) attached to X101 has an internal hardware failure.
  • Intermittent power supply to the device connected via DRIVE-CLiQ socket X101, causing it to drop offline.
  • Electromagnetic interference (EMI) severely disrupting the DRIVE-CLiQ communication signals on the cable to X101.
  • Incorrectly terminated DRIVE-CLiQ network segment if X101 is the last or an intermediate connection in a daisy chain.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Consult the fault value r0949 to determine the precise fault reported by the device connected to DRIVE-CLiQ socket X101.

  2. 2

    2. Disconnect and reconnect the DRIVE-CLiQ cable at socket X101 and the connected component to ensure proper seating.

  3. 3

    3. Power cycle the DRIVE-CLiQ component connected to X101 to clear any transient internal errors.

  4. 4

    4. Replace the DRIVE-CLiQ cable attached to X101 with a new, tested cable of appropriate length and shielding.

  5. 5

    5. Check the shielding and grounding of the DRIVE-CLiQ cable for X101 to minimize potential EMI influence.

  6. 6

    6. Verify the DRIVE-CLiQ topology and device addresses (e.g., via p9921[x]) to ensure correct communication setup.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Siemens SINAMICS S120/S150 Reference List