Ny-Series Instructions Reference Manual (W560 - Omron NY532-5400 Reference Manual

• If a file is open when the operating mode of the CPU Unit is changed to PROGRAM mode or when a
major fault level Controller error occurs, the file is closed by the system. Any read/write operations
that are in progress are completed to the end.
• For an NJ/NX-series CPU Unit, if a file is open when the power supply is stopped with the SD Mem-
ory Card power supply switch, the file is not corrupted.
• For an NJ/NX-series CPU Unit, if a file is open and the SD Memory Card is removed before the SD
Memory Card power supply switch is pressed, the contents of the file will sometimes be corrupted.
For an NJ/NX-series CPU Unit, if a file is open and the SD Memory Card is removed before the SD
Memory Card power supply switch is pressed, the contents of the file will sometimes be corrupted.
Always turn OFF the power supply before removing the SD Memory Card.
• For an NJ/NX-series CPU Unit, if a file is open when the power supply is stopped or the SD Memory
Card is removed, it will not be possible to read or write the file even if the SD Memory Card is inserted
again.
• Do not simultaneously access the same file. Perform exclusive control of SD Memory Card instruc-
tions in the user program.
• An error occurs in the following cases. Error will change to TRUE.
• The SD Memory Card is not in a usable condition.
• The SD Memory Card is write protected.
• There is insufficient space available on the SD Memory Card.
• The maximum number of directories is exceeded.
• The directory specified by DirName already exists.
• If more than four SD Memory Card instructions that do not have a FileID variable (i.e., FileWrite-
Var, FileReadVar, FileCopy, DirCreate, FileRemove, DirRemove, and FileRename) are executed
at the same time.
• The value of DirName is not a valid directory name.
• The value of DirName exceeds the maximum number of characters allowed in a directory name.
• An error that prevents access occurs during SD Memory Card access.
• The file specified by FileName is being accessed.
Sample Programming
Refer to the sample programming that is provided for the FileCopy instruction (page 2-1298).

NY-series Instructions Reference Manual (W560)

2 Instruction Descriptions
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