Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 318

*1 This operation is saved when "Save device write operation" is enabled in the PLC RAS tab of the PLC parameter.
*2 This operation is saved only when data is written to the CPU module.
*3 Except when "Disable clearing operation history" is enabled in the PLC RAS tab of the PLC parameter.
*4 When this operation is performed to the drive specified as the target memory for saving operation history, the history of
operation history file creation is saved.
*5 When the setting value is specified with the device, this operation is saved as device data writing. Since it is saved as a
device, the operation is saved when "Save device write operation" is enabled in the PLC RAS tab of the PLC parameter.
Clear operations are saved even when "Save device write operation" is not enabled in the PLC RAS tab of the PLC
parameter.
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