3 MEMORY CONFIGURATION OF C Controller Module
3.4 Files
29
3
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File names and folder names
Use alphanumeric characters and special characters (excluding \, /, *, ?, <, >, |, :, ", $) for a file name and folder name to be
stored. Otherwise, the following symptoms may occur.
• Garbled file name and folder name
• Loss of file and folder
When only a special character (.) is used for a folder name, a folder cannot be created.
• A special character (.) following the usable character codes is not included in the folder name.
A folder, "a" is created when a folder name starts with "a...".
When a file name is composed of lower-case characters, it may be displayed all in upper-case characters when referred from
FTP or Telnet.
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File writing destination
Do not write files to the program memory and data memory using a user program.
Since the number of writable times (life) of program memory and data memory is limited, the available period of a C Controller
module is shortened.
When writing files using a user program, write files to an SD memory card, a USB Mass Storage Class-compliant device, or a
network device
*1
(via FTP/NFS/netDrv), etc.
*1 For details, refer to the manual of VxWorks.
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Uninstallation of external memory devices
If the following memory devices are unmounted while writing data to user files in the memory devices, data corruption or file
system error may occur. When writing data to user files, close the user files before unmounting.
• SD memory card
• USB Mass Storage Class-compliant device
Summary of Contents for MELSEC iQ-R C R12CCPU-V
Page 1: ...MELSEC iQ R C Controller Module User s Manual Application R12CCPU V ...
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Page 23: ...1 EXECUTING PROGRAMS 1 3 I O Access Timing 21 1 MEMO ...
Page 32: ...30 3 MEMORY CONFIGURATION OF C Controller Module 3 4 Files MEMO ...
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