Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 325

The following table lists operations of the CPU module by the SD memory card status when the SD memory
card is specified as the save destination memory.
• Operations when the CPU module is powered off and on or is reset
Status
An SD memory card is not inserted.
The write protect switch of the SD memory card is enabled (write-
protected).
An SD memory card is inserted.
• Operations when an operation whose operation history is saved in RUN/STOP (PAUSE) state is executed
Status
The SD memory card is removed or is forcibly disabled.
The write protect switch of the SD memory card is enabled (write-
protected).
The SD memory card is removed and other SD memory card in
which the operation history file is stored is inserted.
The write protect switch of the SD memory card is changed to be
disabled or the SD memory card forced disable is cleared.
An SD memory card is inserted. (The write protect switch of the SD
memory card is disabled and the SD memory card forced disable is
cleared.)
Operation
A stop error occurs when an operation history file is created.
If no operation history file exists, a stop error occurs when an
operation history file is created.
When an operation history file exists, the CPU module starts up
successfully.
The CPU module starts up successfully.
Operation
The operation history is temporarily saved in the internal memory. If
the memory reaches the maximum number of operation histories it
can store, all subsequent histories are lost.
A continuation error occurs at the execution of the operation to be
saved. (The operation history can be displayed in the programming
tool.)
• If the file size is same, operation histories are continued to be
saved in the existing operation history file.
• If the file size is different, the existing operation history file is
deleted and a new file is created.
Operation histories are continued to be saved in the existing
operation history file.
Operation histories are saved in the operation history file.
CHAPTER 3 FUNCTIONS
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