Power EEPROM data defective or too old

What does 256–258 mean?

The data stored in the power EEPROM (Electrically Erasable Programmable Read-Only Memory) is either corrupted, unreadable, or outdated. This can compromise the drive's ability to operate correctly by affecting stored parameters or configuration.

• Data corruption in the power EEPROM caused by voltage transients or power fluctuations during a write operation.
• Degradation or end-of-life of the EEPROM memory cells, leading to unreliable data storage and retrieval.
• Firmware incompatibility where the main control board's firmware requires a newer EEPROM data structure than what is present.
• Failed write operation to the EEPROM during a parameter save or firmware update.
• External electromagnetic interference (EMI) disrupting the EEPROM read/write cycles.

Click steps to track your progress.

1. 1

   1. Perform a full power cycle of the drive by disconnecting input power for at least 60 seconds, then reapply power.

2. 2

   2. Attempt to clear the fault by accessing parameter P16-90 (Fault Log) and selecting the 'Clear All Faults' option.

3. 3

   3. Update the drive's main firmware to the latest compatible version (e.g., using a dedicated flash tool or SD card) which may include EEPROM data structure updates.

4. 4

   4. Execute a drive parameter backup (if possible) and then a factory reset (P8-01 to [1] Factory reset) to reinitialize EEPROM data, then restore parameters.

5. 5

   5. Check the stability of the drive's auxiliary control power supply (e.g., 24VDC at terminal X1/1 and X1/2) for voltage fluctuations during operation.