COFFÂ Command Off / Panel Loss fault in Toshiba drive
COFF Command Off / Panel Loss fault in Toshiba drive
Description COFF is a safety trip that occurs when the Local Keypad or Control Panel is disconnected while the drive is in "Local" control mode. If the user is controlling the speed via the keypad knob or buttons, and the keypad is unplugged (or the cable breaks), the drive loses its command source. To prevent the motor from running indefinitely without a way to stop it, the drive trips COFF. Causes
1. Loose Keypad: The removable keypad on the front of the drive was bumped or vibrated loose.
2. Cable Failure: If using a remote mounting kit (keypad on a cabinet door), the extension cable is damaged or disconnected.
3. Interference: High electrical noise on the remote keypad cable disrupting the data stream. Solution If the keypad is mounted directly on the drive, remove it and clean the contacts. Re-seat it firmly until it clicks.
If the keypad is remote mounted on a panel door, check the RJ45/CAT5 cable connecting it. Ensure the cable is not run in the same duct as the motor power cables.
If you want the drive to continue running even if the keypad is removed (e.g., for monitoring only), you must change the "Panel Loss Action" parameter. However, if the keypad is the *source* of the Run command, you cannot bypass this. The drive must have a valid Run source.
Description COFF is a safety trip that occurs when the Local Keypad or Control Panel is disconnected while the drive is in "Local" control mode. If the user is controlling the speed via the keypad knob or buttons, and the keypad is unplugged (or the cable breaks), the drive loses its command source. To prevent the motor from running indefinitely without a way to stop it, the drive trips COFF. Causes
1. Loose Keypad: The removable keypad on the front of the drive was bumped or vibrated loose.
2. Cable Failure: If using a remote mounting kit (keypad on a cabinet door), the extension cable is damaged or disconnected.
3. Interference: High electrical noise on the remote keypad cable disrupting the data stream. Solution If the keypad is mounted directly on the drive, remove it and clean the contacts. Re-seat it firmly until it clicks.
If the keypad is remote mounted on a panel door, check the RJ45/CAT5 cable connecting it. Ensure the cable is not run in the same duct as the motor power cables.
If you want the drive to continue running even if the keypad is removed (e.g., for monitoring only), you must change the "Panel Loss Action" parameter. However, if the keypad is the *source* of the Run command, you cannot bypass this. The drive must have a valid Run source.
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