Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 302

(6) Clearing module error history
Module error logs can be cleared by clicking the
information on each intelligent function module displayed under "Error Details" is not cleared.
The module error history is cleared when the standard RAM is formatted.
Note that a module error collection file cannot be deleted since it is automatically created after the CPU module is powered
off and then on or is reset. To delete the file, clear the setting and then format the standard RAM.
(7) Precautions
(a) Using the CPU module change function with memory card
Backing up or restoring data will stop collecting module errors.
(b) Using the CPU module data backup/restoration function
Backing up or restoring data during the module error collection will stop collecting module errors.
300
button in the "Error History" screen. Note that error