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When a parameter value is modified by the Modbus on Altivar 71 drive, then why the parameter value is lost.

When a parameter value is modified by the Modbus communication, the parameter is only writing in drive RAM. So when the drive is Power OFF/ON, the value is lost and the parameters revert to the last saved value in EEPROM.
To write a parameter in Drive EEPROM, it is necessary to write CMI (logic address 8504) bit 1.
CMI bit 1: Save configuration to EEPROM memory command (active at 1).
 
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