Applicable Systems
S7-1200
S7-1500
S7-300
S7-400
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SINAMICS
Symptoms
Internal software error. The V90 has detected an internal firmware fault that requires attention. The drive enters a safe state and stops the motor.
Possible Causes
- Firmware bug or corruption
- Internal parameter set corruption
- Control board memory error
- Firmware version incompatibility with hardware revision
Troubleshooting Steps
- Step 1: Power-cycle the V90 (remove and reapply power)
If F1015 clears, it was a transient firmware issue; monitor for recurrence - Step 2: If F1015 returns, reload the firmware via Siemens TIA Portal
Firmware update completes; V90 initializes normally - Step 3: Verify the firmware version is compatible with the hardware revision
Firmware version matches the V90 hardware revision per Siemens compatibility matrix - Step 4: If firmware reload does not resolve, the control board has a hardware defect
Drive replacement required
How to Reset
1) Power cycle. 2) Reload firmware. 3) Verify compatibility. 4) Replace drive if persistent. Caution: Do not interrupt power during firmware updates.
Frequently Asked Questions
- Q: How do I update V90 firmware?
In TIA Portal: Online & Diagnostics > Drive > Firmware Update. Select the firmware file (.frm) and follow the wizard. Ensure stable power throughout the process.
- Q: Can I downgrade V90 firmware?
Generally no. Siemens does not support firmware downgrades for V90. Always use the latest firmware version compatible with your hardware revision.
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Source: Siemens SINAMICS V90 Operating Instructions, Edition 01/2023
Category: PLC & VFD
Published: 2026-11-02
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