Drive And File Configuration - Mitsubishi Electric MELSEC iQ-R C User Manual

2.2

Drive and File Configuration

This section shows drives and file configuration.
Drive configuration
The following table shows the drive names and file systems corresponding to memory.
Type Memory name
CPU built-in memory Standard ROM
System memory
Memory card SD memory card
Memory life
The following shows the number of writable times (life) of the standard ROM.
■Standard ROM life
The life is represented as a write count index value and data can be written until it reaches to 100,000 times. However, since
the system increases the life for writing of the standard ROM, the write count index value differs from the actual write count.
When the write count index value exceeds 100,000 times, the following cases occur. In this case, replace the C intelligent
function module.
• Decreasing the writing speed to the standard ROM
• Unable to write to the standard ROM
■Checking the write count index value
The write count index value can be acquired by using the C intelligent function module function (CITL_GetUnitStatus).
When the write count index value exceeds 100,000 times, it will be registered in the event history.
• Since the operation of the standard ROM is checked at factory acceptance test, the initial value of the write
count index is not 0.
• Since a C intelligent function module always checks data in the standard ROM, the write count index value
may be increased.
Drive name File system
/ROM FAT16
/SYSTEMROM FAT16
/SD FAT16/FAT32
Application
Memory to store user programs, script files, or any file/folder. The
number of writable times (life) of the standard ROM is limited.
It can be accessed from an FTP, a Telnet, and a user program.
Memory to store system files.
Files cannot be written to the system memory.
Memory to store user programs, script files, or any file/folder.
It can be accessed from an FTP, a Telnet, and a user program.
2.2 Drive and File Configuration
2 SPECIFICATIONS
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