Mitsubishi QJ71E71-100 Series, Руководство пользователя

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MELSEC-Q
5 WHEN USING FILE TRANSFER FUNCTIONS (FTP SERVER)
(5) Precautions when writing a file
1) Operation to overwrite an existing file cannot be performed.
Either delete corresponding file using the file delete command (delete, mdelete),
or change the file name using rename command before the file is written.
2) The sequence program file set in the parameter file currently used for the
QCPU operation cannot be written.
Set the QCPU to the stop state, then write in the file.
3) File transmission (attributes change, file write, etc.) for file write can only be
conducted for the QCPU program memory or the memory card RAM area.
4) Check the number of files that can be registered to the drive for the files to be stored.
File write cannot be performed to a drive where the number of files has
already reached the allowed number of registered files.
The files are stored in the designated drive's cluster size units.
5) Any drives which fit in the size of the continuous unused clusters in the
designated drive memory can be written.
6) When restarting the QCPU operation after writing a file, it is recommended to
set to the run status using the QCPU key switch.
The QCPU can be switched from STOP to RUN using the FTP command,
but sufficient caution must be taken for the PLC system operations.
7) When writing files, the Ethernet module creates temporary work files
(FTP_Ixxx.TMP) in the QCPU.
The temporary files are automatically created in the designated drive during
the file write (put or mput), and the file name is changed to the designated file
name after the operation is completed.
The "xxx" in the temporary file name "FTP_Ixxx.TMP" is the upper three digits of
the four digits representing the Ethernet module's I/O signals from the QCPU.
The temporary file is automatically deleted when the file write is
successfully completed, line is shut down during transfer, or a file capacity
error occurs with the QCPU.
8) The temporary work file may remain in the designated drive when the QCPU
power is disconnected or reset during the file write.
When the temporary file remains in the drive, delete the file using the FTP
command.
9) In the case where file deletion and file writing are repeated while the QCPU is
in RUN status, the file size must be fixed in advance. If a file is deleted and
then writing of another file larger than the deleted one is attempted, a 402B
error will occur disabling the file writing.