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Er4 fault error code in Mitsubishi E800 drive

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Cause : Mode designation error comes when parameter setting was attempted in the External or NET operation mode while Pr.77 = "1". Parameter write was attempted when the command source is not at the operation panel (FR-DU08).

  1. Check that operation mode is PU operation mode. 
  2. Check that the Pr.551 setting is correct.
  3. After setting the operation mode to the "PU operation mode", make parameter setting.
  4. When Pr.77 = "2", parameter write is enabled regardless of the operation mode.
  5. Set Pr.551 = "2"
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