EEP (EEP1, EEP2, EEP3) EEPROM Error / Data Write Error fault in Toshiba drive
EEP (EEP1, EEP2, EEP3) EEPROM Error / Data Write Error fault in Toshiba drive
Description The EEPROM is the memory chip where all your parameter settings are stored. An EEP fault means the data on this chip has become corrupted, or the chip itself has physically failed. It can also occur if power is cut exactly while the user is saving a parameter. EEP1 usually means a data write error, while EEP2/3 can imply initial data corruption or hardware issues. Causes
1. Power Loss during Save: Turning the drive off while the display says "Writing".
2. Electrical Noise: Extreme EMI/RFI noise on the control cables corrupting the data bus.
3. Aging Component: Flash memory has a limited number of write cycles (usually 100,000+), though rare, it can wear out in automated systems that write parameters continuously via comms.
4. Control Board Failure: The logic board is faulty. Solution The first step is to try a factory reset. Navigate to the "Type Reset" or "Standard Setting" parameter (often tYP or similar). Set it to "3" (Standard Factory Reset). This will wipe all custom settings and restore the drive to out-of-box state. If the reset is successful, the fault will clear. You will then need to reprogram your motor data and application settings.
If the fault persists after a power cycle and you cannot perform a reset, the control board is dead. You may need to replace the control card or the entire drive.
To prevent recurrence: If you are controlling the drive via Modbus/Ethernet and changing parameters dynamically (e.g., changing accel time every cycle), ensure you are not writing to the EEPROM every time. Change the setting to "RAM Write Only". Writing to RAM is volatile (lost on power down) but has infinite cycles. Writing to EEPROM constantly will kill the memory chip within months. Check grounding of the control board to prevent noise corruption.
Description The EEPROM is the memory chip where all your parameter settings are stored. An EEP fault means the data on this chip has become corrupted, or the chip itself has physically failed. It can also occur if power is cut exactly while the user is saving a parameter. EEP1 usually means a data write error, while EEP2/3 can imply initial data corruption or hardware issues. Causes
1. Power Loss during Save: Turning the drive off while the display says "Writing".
2. Electrical Noise: Extreme EMI/RFI noise on the control cables corrupting the data bus.
3. Aging Component: Flash memory has a limited number of write cycles (usually 100,000+), though rare, it can wear out in automated systems that write parameters continuously via comms.
4. Control Board Failure: The logic board is faulty. Solution The first step is to try a factory reset. Navigate to the "Type Reset" or "Standard Setting" parameter (often tYP or similar). Set it to "3" (Standard Factory Reset). This will wipe all custom settings and restore the drive to out-of-box state. If the reset is successful, the fault will clear. You will then need to reprogram your motor data and application settings.
If the fault persists after a power cycle and you cannot perform a reset, the control board is dead. You may need to replace the control card or the entire drive.
To prevent recurrence: If you are controlling the drive via Modbus/Ethernet and changing parameters dynamically (e.g., changing accel time every cycle), ensure you are not writing to the EEPROM every time. Change the setting to "RAM Write Only". Writing to RAM is volatile (lost on power down) but has infinite cycles. Writing to EEPROM constantly will kill the memory chip within months. Check grounding of the control board to prevent noise corruption.
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