Data backup problem involving the NVRAM

What does F01690 mean?

A problem has occurred during data backup to the Non-Volatile RAM (NVRAM), potentially leading to loss of configuration data if power is removed. This indicates a critical memory or hardware issue that could result in needing to reconfigure the drive after a power cycle.

• NVRAM hardware defect on the Control Unit (CU), preventing successful data write operations.
• Power supply instability or momentary loss of power during a write operation to the NVRAM, corrupting the data.
• Firmware bug or corrupted firmware preventing proper NVRAM access and backup procedures.
• Excessive write cycles to the NVRAM due to frequent parameter changes or debugging, leading to memory wear.

Click steps to track your progress.

1. 1

   1. Cycle power to the drive system and attempt to save parameters again (e.g., via p0971 or commissioning software).

2. 2

   2. Verify the stability of the 24VDC control power supply to the Control Unit, measuring voltage levels during save attempts.

3. 3

   3. Perform a firmware update on the Control Unit to the latest stable version to address potential software bugs.

4. 4

   4. Back up all parameters to an external engineering tool (e.g., STARTER) and then perform a factory reset (p0010=30, p0970=1) to clear potentially corrupted NVRAM.

5. 5

   5. If the fault persists after firmware update and factory reset, consider replacing the Control Unit as the NVRAM may be defective.