Cause : Save error 2 comes when writing the parameters incorrectly at the time you copy parameters to the drive. For example, you copy the new firmware version with added parameters to the drive with old firmware version.

The error code SE2 on your Delta MS300 drive indicates a "Keypad COPY error 2: Keypad copy parameter writing error." This means that the parameters were successfully transmitted from the keypad to the drive, but there was an issue during the writing process to the drive's memory.

1. In this stage, the copied data has been transmitted to the Slave.
2. The Slave compares and processes the copied data, and then saves the data to the Data ROM.
3. During the process, the data error (should be attribution error) may occur, or the data cannot be saved to EEPROM.
4. At this time, the warning occurs.
5. It is suggested to check the status of Data ROM and remove the error causes first.