E-10Â VI Analog Input Signal Loss fault in Toshiba drive
E-10 VI Analog Input Signal Loss (Voltage) fault in Toshiba drive
Description The E-10 fault is specific to the "VI" (Voltage Input) terminal, typically used for 0-10VDC speed reference signals. The drive monitors this input; if the voltage drops below a specified "Signal Loss Level" (e.g., 1V or 0.5V) for a set duration, the drive trips. This prevents the motor from running at minimum speed (or stopping) unpredictably if the potentiometer wire breaks or the PLC analog output card fails. Causes
1. Broken Wiper: The middle leg (wiper) of the speed potentiometer has lost contact.
2. Loose Terminal: The VI screw terminal is loose.
3. PLC Output Failure: The external controller is outputting 0V (Stop) but the drive is configured to treat anything below 1V as a fault (Live Zero).
4. Noise: Induced AC noise on the analog line is canceling out the DC signal. Solution Measure voltage between VI and CC (Common).
- If you read 0V: The signal is lost. Check the external pot or PLC.
- If you read 5V but still have E-10: Check the "Signal Loss Detection Level" parameter (F200 series). It might be set too high (e.g., requiring 6V minimum).
If you are purposely trying to stop the drive by sending 0V, you must disable the E-10 protection. Set "VI Signal Loss Action" to "None" or "0". This fault is only useful if you want to ensure the cable is always intact (e.g., using a 2-10V signal range).
Description The E-10 fault is specific to the "VI" (Voltage Input) terminal, typically used for 0-10VDC speed reference signals. The drive monitors this input; if the voltage drops below a specified "Signal Loss Level" (e.g., 1V or 0.5V) for a set duration, the drive trips. This prevents the motor from running at minimum speed (or stopping) unpredictably if the potentiometer wire breaks or the PLC analog output card fails. Causes
1. Broken Wiper: The middle leg (wiper) of the speed potentiometer has lost contact.
2. Loose Terminal: The VI screw terminal is loose.
3. PLC Output Failure: The external controller is outputting 0V (Stop) but the drive is configured to treat anything below 1V as a fault (Live Zero).
4. Noise: Induced AC noise on the analog line is canceling out the DC signal. Solution Measure voltage between VI and CC (Common).
- If you read 0V: The signal is lost. Check the external pot or PLC.
- If you read 5V but still have E-10: Check the "Signal Loss Detection Level" parameter (F200 series). It might be set too high (e.g., requiring 6V minimum).
If you are purposely trying to stop the drive by sending 0V, you must disable the E-10 protection. Set "VI Signal Loss Action" to "None" or "0". This fault is only useful if you want to ensure the cable is always intact (e.g., using a 2-10V signal range).
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