Power unit: EPROM checksum error

What does F30805 mean?

Internal parameter data stored in the power unit's EEPROM is corrupted, as evidenced by a checksum error. This means critical configuration or operational parameters are invalid, leading to system malfunction. The fault value may indicate an EEPROM access error or too many blocks within the EEPROM.

• Corrupted data in the power unit's EEPROM (Electrically Erasable Programmable Read-Only Memory) due to electrical disturbances or power fluctuations.
• Failed EEPROM chip or memory corruption within the power unit's control board.
• Invalid parameter download (e.g., partial or incorrect file) resulting in a checksum mismatch upon boot.
• Firmware bug causing incorrect EEPROM writes or checksum calculations.
• Aging or defective EEPROM memory retention in the power unit.

Click steps to track your progress.

1. 1

   Perform a complete power cycle of the drive system to attempt re-reading the EEPROM data and recalculating the checksum.

2. 2

   Back up the drive parameters from the control unit (if accessible) and then execute a factory reset of the power unit.

3. 3

   Reload a known good parameter set to the power unit (e.g., from a previously saved project file in STARTER/TIA Portal).

4. 4

   Ensure power supply to the drive is stable and within specified voltage tolerances (e.g., measure supply voltage at L1, L2, L3 terminals).

5. 5

   If the fault persists after multiple attempts to reset and reload parameters, the power unit itself may have a defective EEPROM and require replacement.