The "CAN err" Light Is Blinking On My Schneider VFD. Is Something Wrong?

The CAN light indicates a CANopen error. CANopen is a communication protocol similar to Modbus. We do not use CANopen since we use Modbus. Since CANopen is not used, those parameters are used for read-only references to ensure that a drive is programmed. Therefore, it is normal for the CAN light to be on since those parameters are programmed and CANopen is not being used.