Causes And Corrective Actions - Mitsubishi Electric 800 Series Instruction Manual

6.4

Causes and corrective actions

Error message
A message regarding operational troubles is displayed. Output is not shut off.
Abbreviation LOCD
Name
Password locked
Description
Password function is active. Display and setting of parameters are restricted.
Check point
Enter the password in Pr.297 Password lock/unlock to unlock the password function before operating.
Corrective action
(Refer to
Abbreviation Er1
Name
Parameter write error
• Parameter setting was attempted while Pr.77 Parameter write selection is set to disable parameter write.
• Overlapping range has been set for the frequency jump.
Description
• Overlapping range has been set for the adjustable 5 points V/F.
• The PU and inverter cannot make normal communication.
• Check the Pr.77 Parameter write selection setting. (Refer to
• Check the settings of Pr.31 to Pr.36 (frequency jump). (Refer to
Check point
• Check the settings of Pr.100 to Pr.109 (adjustable 5 points V/F). (Refer to
• Check the connection of PU and the inverter.
Abbreviation Er2
Name
Write error during operation
Description
Parameter write was attempted while Pr.77 = "0".
Check point
• Check that the inverter is stopped.
• After stopping the operation, make parameter setting.
Corrective action
• When setting Pr.77 = "2", parameter write is enabled during operation. (Refer to
Abbreviation Er3
Name
Calibration error
Description
Analog input bias and gain calibration values have been set too close.
Check point
Check the settings of Pr.902, Pr.903, Pr.904, and Pr.905 (calibration functions). (Refer to
Abbreviation Er4
Name
Mode designation error
• Parameter setting was attempted in the External or NET operation mode while Pr.77 = "1".
Description
• Parameter write was attempted when the command source is not at the operation panel.
• Check that operation mode is PU operation mode.
Check point
• Check that the Pr.551 setting is correct.
• After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to
Corrective action
• When Pr.77 = "2", parameter write is enabled regardless of the operation mode. (Refer to
• Set Pr.551 = "2". (Refer to
Abbreviation Er8
Name
USB memory device operation error
• An operation command was given during the USB memory device operation.
Description
• A copy operation (writing) was performed while the PLC function was in the RUN state.
• A copy operation was attempted for a password locked project.
• Check if the USB memory device is operating.
Check point
• Check if the PLC function is in the RUN state.
• Check if the project data is locked with a password.
• Perform the operation after the USB memory device operation is completed.
• Stop the PLC function. (Refer to
Corrective action
• Unlock the password of the project data using FR Configurator2. (Refer to the Instruction Manuals of FR
page 255.)
page
Configurator2 and GX Works2.)
Causes and corrective actions
————
page
301.)
page 533 and the PLC function programming manual.)
PROTECTIVE FUNCTIONS
251.)
page 330.)
page 598.)
page 251.)
page 402.)
page
page 251.)
291.)
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