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(e) File creation timing
The following table lists the timing when an operation history file is created.
*1 The existing operation history file is deleted and a new file is created.
*2 An operation history file is created when the parameter-valid drive is the program memory or standard ROM and the SD
memory card is set as the save destination memory in the operation history setting of the PLC parameter.
When a new operation history file is created, "Operation History File Creation Information" is saved.
Timing Description
The CPU module is powered off and on.
• When no operation history file exists
• When an operation history file exists and the file size is changed in the operation
history setting
*1
The CPU module is reset.
• When no operation history file exists
• When an operation history file exists and the file size is changed in the operation
history setting
*1
The PLC memory is formatted.
When the PLC memory is formatted for the save destination memory of the
operation history setting of the PLC parameter
An operation history file is deleted.
When an operation history file stored in the save destination memory set in the
operation history setting is deleted
An operation history file name is changed.
When the name of an operation history file stored in the save destination memory
set in the operation history setting is changed
An SD memory card is inserted.
*2
• When no operation history file exists
• When an operation history file exists and the file size is changed in the operation
history setting
*1
The CPU module data backup/restoration function is
executed.
When a restoration, whose setting for operation after restoration is set to operate
with the initial status (b15 of SD918 is off), is executed
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