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Memory Card
A QCPU equips a built-in memory as standard for storing parameters and
programs, therefore, the programs can be executed without a memory card.
The memory cards are required for the situations in the table below.
Type Description
SRAM card
Data can be written or changed within the memory capacity.
<Example of the usage>
• For the boot operation
• For storing the sampling trace data
• For storing the SFC trace data
• For storing the error history data
Flash card
The contents of the program memory or the specified file can be written at a time.
The newly written data replaces all original data. Data can be read by the READ instruction of
the sequence program.
<Example of the usage>
• For the boot operation
• When the changing the data is unnecessary
ATA card
Data can be written or changed within the program capacity.
Programmable controller user data of an ATA card can be accessed by the file access
instruction (such as the FWRITE instruction) in a sequence program through a CSV format or
binary format.
<Example of the usage>
• For the boot operation
• For programmable controller user data (general-purpose data)
Memory Card
• Memory cards are required when the data capacity exceeds
the capacity of the built-in program memory, standard RAM,
and standard ROM.
• Select the memory card according to the size of the program
or the type of the data to be stored.
• Install the enclosed backup battery before using the
SRAM-type RAM card first. The SRAM card data cannot be
baked up unless the battery is installed.
• Format the memory card before using it.
• Data can be written to a Flash card for 100,000 times, and
for an ATA card, data can be written for 1,000,000 times.